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Klättermusen Fabric and Technology

Klättermusen Fabric and Technology

- Klettalmusen Fabrics & Technology -

Klettalmusen is a solitary outdoor brand based in Åre, Sweden, the largest resort in Northern Europe. It is characterized by carefully selected materials, ergonomic design, and unique attention to detail, and has been loved by many adventurers for over 40 years since its establishment in 1975. In particular, our sustainability initiatives have been widely praised.

In particular, when it comes to material development, we are uncompromising in everything, and are the most particular of all outdoor brands. Twenty years ago, we began working on environmentally friendly recycling initiatives ahead of other brands. They sent a message to the outdoor industry.
"The most ecological choice is not to make products at all. And the second best choice is to make them from recycled materials."

Since the early 2000s, Klettalmusen has been using organic cotton and merino wool extensively in its technical wear, raising the alarm from an environmental and sustainability perspective about the outdoor industry's products, which often use synthetic fibers made from petroleum-based raw materials. It started ringing. Since then, Klettalmusen's history of unique material development has always been an innovative front-runner and unrivaled.

2004: Introduced organic cotton material into cotton products
2008: Started using recycled polyester material made from fishing nets
2009: Started activities to upcycle used items
2009: We established our own internal environmentally friendly indicators and decided to use environmentally friendly materials in all products.
2010: Introduced the world's first fluorocarbon-free (completely free of organic fluorine compounds) jacket.
2014: All wool products replaced with traceable mulesing-free merino wool
2015: Changed nylon material to biomass nylon produced from soybean substrate instead of petroleum
2017: First outdoor brand to successfully make all collection products PFOA-free (completely eliminating organic fluorine compounds)

We will introduce Klettalmusen's current material development, technology, unique indicators for product selection, etc.


Recycled Polyester

- Recycled PET bottle recycled polyester material -

Klettalmusen has been using recycled polyester for over 10 years. Recycled polyester also has benefits from a sustainability perspective. Significantly less hazardous than virgin polyester production, the manufacturing process reduces water, air and soil pollution, saves energy and reduces existing waste.

Klettalmusen's recycled polyester is made from industrial waste and post-consumer plastic bottles. The resulting fabric is not only comparable to virgin polyester fabric, but superior to virgin polyester fabric. Klettalmusen's process replaces virgin resources with superior know-how, yielding even greater benefits in terms of both performance and sustainability.

Recycled Polyamide

- Post-consumer waste recycled polyamide material -

Polyamide (nylon) is a synthetic fiber made from petroleum that produces extremely strong and versatile fabrics. Klettalmuthen uses recycled polyamide from industrial waste and post-consumer sources.

For those of us who want to encourage people to send their used products for recycling, post-consumer waste is the first choice. Post-consumer waste materials used in recycled polyamide include discarded industrial fishing nets, old carpets, and hard fibers.

Recycling polyamide adds more complexity to the production process, but the result is a reliable, long-lasting material that is lightweight, quick-drying, wind-resistant, and reduces waste while saving energy and resources. You can use what is. In 2009, Klettalmusen became the first outdoor company to use recycled polyamide in all of its backpacks.

Recycled wool

- Recycled wool -

Giving new life to old, unwearable clothes is a highly effective way to be sustainable. The Italian recycled wool used by Klettalmusen is sourced from all over the world. It is collected not only from old clothes, but also from cut parts of new fabrics.

These materials are sorted by fiber content and color, then washed and reduced to fibers. From this fiber, new materials are spun and woven into new, warm, and cozy clothing.

Ultramid® Biomass Balance Polyamide

- Ultra biomass renewable raw material -

Polyamide (nylon) is a durable, strong fiber that extends the life of the product. Ultramid biomass polyamide has the same high-quality properties as traditional polyamide, but is a much more sustainable material. The production of Ultramid biomass polyamide replaces a certain amount of fossil resources with renewable raw materials such as biogas and bionaphtha.

Klettalmuthen uses 100% renewable raw materials. This is an important step towards more sustainable products, contributing to reducing greenhouse gas emissions and conserving fossil resources. Renewable resource usage is monitored by a third-party certification system. Klettalmusen is the first outdoor brand to use this fiber.

Merino Wool

- Merino wool -

Wool absorbs moisture, retains warmth, and resists odor better than any other material. Klettalmusen's wool products are made from Meriwool, which is known for its high quality, softness and ability to regulate body temperature even during intense exercise.

Wool fibers have scales, and we use a unique chlorine-free process to remove these scales and make them soft and comfortable.

In addition, we do not use mulesing wool, which is made by cutting the skin on the rump of lambs to make cheap wool products in order to prevent insects from infecting the sheep.

Klettalmusen wool is always 100% mulesing and chlorine-free.

Organic Cotton

-Organic cotton-

At Klettalmusen, we only use organic cotton to reduce our impact on the environment. Traditional cotton is considered one of the most environmentally polluting crops due to the large amounts of pesticides and insecticides used during production. There are also concerns about worker rights, child labor and unsustainable water consumption.

Organic cotton is grown without the use of pesticides, chemical fertilizers or genetically modified crops. Instead, we use methods such as beneficial insects and mechanical weeding to reduce the burden on the environment. Cultivation is carried out in an environmentally friendly manner, protecting workers from harmful chemicals while working and preventing contamination of drinking water in the surrounding area.

Klettalmusen has two different third-party certifications for organic cotton. One is the GOTS certification, the world's highest certification for organic cotton, and the other is the EU Council Directive on Organic Agriculture.

Lyocell Tencel

- Resource-efficient Tencel fiber -

Tencel is the brand name for a fiber called lyocell, which is more absorbent than cotton, softer than silk, and cooler than linen. The advantage of using Tencel next to your skin is that it has a natural antibacterial effect that prevents moisture from forming on the fibers by transporting moisture inside the fibers.

Tencel is a recycled fiber made by melting wood pulp. Although it is a cellulose fiber like viscose, it uses an environmentally friendly manufacturing process. TENCEL uses less energy and water, uses no chlorine, produces minimal waste, and is considered non-hazardous.

When products made with Tencel reach the end of their lifespan, they can be recycled and, since they are made from cellulose fibers, they are also biodegradable.

RDS Certified Down

- Top quality RDS certified insulation down -

At Klettalmuhsen, we only use the highest quality 800+ fill power goose down as insulation for our down products. Therefore, with proper care, it will maintain its shape and insulation properties for decades.

All down used by Klettalmusen is RDS Certified (Responsible Down Standard). Being RDS certified means the entire supply chain has been audited and the bird's life is respected throughout its lifecycle. For example, live plucking and force feeding are strictly prohibited and all down is fully traceable back to the farm.

Klettalmusen chooses to use unbleached down that does not contain chlorine, so the few feathers in all our down products will darken. If there are any feathers showing through the outer material, gently squeeze or shake until the feathers disappear.


Cutan Proprietary Waterproof

- Unique waterproof membrane technology -

Coutan is Klettalmusen's proprietary waterproof and breathable technology that improves the performance and sustainability of existing fabrics by developing a PTFE-free membrane and eliminating fluorine compounds during production. was developed to improve both. Kutan fabric is flexible, has excellent stretch and is 100% fluorine free.

Coutan fabrics are composed of 3 or 2,5 layers of membrane fabric and are impregnated with a fluorine-free, water-repellent impregnating agent that has excellent waterproof and breathable properties. The membrane is made from polyurethane and is hydrophilic.

Coutan Super Stretch consists of three layers: an inner layer of polyamide, a central waterproof polyurethane membrane and an outer layer of polyamide and stretch fibers. These three layers of fabric are laminated to form one piece of fabric.

Coutan Stretch RP consists of three layers: an inner polyester fabric, a waterproof polyester interlayer, and an outer fabric made from 100% recycled polyester (RP). These three layers of fabric are stacked together to form one piece of fabric. Coutan Stretch RP is 100% recyclable.

Eta Proof

- High performance organic cotton -

Etaproof is a highly functional fabric made from organic cotton and GOTS certified cotton. Cotton is quiet when used, and like denim, it develops a beautiful patina that can be enjoyed over time.

Eta-Proof is a fabric with excellent natural wind resistance, as the fibers swell when exposed to moisture, sealing the fabric. Combined with a DWR (durable water repellent) treatment, it is highly water resistant and is an extremely advanced and flexible material. The organic waterproofing on the surface will keep you dry for a while in light rain, but if pouring rain is expected, it's wise to bring a waterproof shell.

It is a material made of densely woven long fibers, which has the benefits of improved durability and abrasion resistance, and its good breathability makes it attractive for mountain climbing in low-temperature areas.

Wind Stretch

- Soft shell material with excellent abrasion resistance and stretch properties -

Windstretch is a softshell material with excellent abrasion resistance and stretch that allows for greater movement. It has excellent breathability, moisture absorption, and quick drying properties, making it suitable for intense exercise. It has excellent wind resistance and is used in soft shell products where flexibility and durability are important. It maintains its appearance without losing color or pilling even after heavy use.

Windstretch 180 g/m2 is a versatile softshell with excellent durability, stretch, and a fluorine-free, water-repellent finish. Blend of 70% recycled polyamide, 20% polyester, and 10% elastane.

Light Windstretch 159 g/m2 is Klettalmusen's lightest, quick-drying and stretchiest softshell material. Made from a blend of 85% recycled polyamide and 15% elastane with a fluorine-free, water-repellent finish.

PrimaLoft Gold

- Improved wicking insulation -

Primaloft has long had the advantage of being more resistant to moisture than regular down. Lightweight, slim volume with excellent breathability and moisture resistance to ensure warmth.

PrimaLoft Gold Insulation Active Plus provides the breathable warmth you need to keep you dry and comfortable, from morning runs to alpine activities.

Thermally efficient insulation provides just the right amount of warmth, breathability and two-way stretch so you can move quickly and freely. This fabric can trap excess water vapor that accumulates during very strenuous activities.

In addition to the 4-way stretch, the wicking ability has been significantly improved, making it especially suitable for strenuous activities in cold regions. An ecological material made from 55% post-consumer recycled content.

Katla Cotton

- Performance organic cotton that replaces synthetic materials -

Katra organic cotton is Klettalmusen's unique performance cotton material that is comparable to synthetic fibers.

Utilizing bionic principles, a natural process, it gives cotton a distinctive lustrous appearance and properties similar to those of synthetic fibers. By subjecting cotton to pressure and heat that mimics geological compression, we create a natural fabric that is windproof, water repellent, and breathable. The addition of ripstop to the fabric significantly increases its strength and allows it to withstand heavy loads.

Because it complies with high-quality ecological standards, it takes much longer to produce than regular cotton. For example, with conventional cotton, the time from fiber to fabric is approximately 55 days. However, lightweight 100% organic cotton material takes more than 85 days. In today's rapidly changing society, Klättalmusen believes that slowdown is necessary for people and the environment.


- Cordura wear-resistant nylon -

Cordura is a nylon-based fabric known for its durability, especially when used to reinforce exposed areas.

Klettalmuthen has been using Cordura since it was first sold in DIY backpack kits in the 80's, and it continues to be the reinforcing fabric of choice due to its high resistance to abrasion.

Cordura is used when the fabric will be in prolonged contact with exposed ground or rock faces. This is especially important for frameless backpacks, but also applies to framed backpacks.

Norna Construction

- Active moisture transport through the fabric -

Norna Fabric is a hybrid fabric with a simple and effective combination of hydrophobic and hydrophilic components.

The hydrophilic base yarn uses wool to create warmth and absorb moisture from your body. Meanwhile, the hydrophobic surface threads are made of polyester to keep moisture away from your body. Combined with a structured weave that creates air close to the body, Norna provides faster drying and greater heat retention without the need for chemical treatments.

Hardur Kevlar

- Kevlar material boasts lifetime durability -

By interweaving aramid fibers and elastic fibers, we have created a highly durable Kevlar fabric that is both stretchy and soft.

Kevlar fibers of different qualities are used for different functions and types of applications, making them unparalleled in ensuring durability and functionality in areas exposed to high amounts of wear and tear. . Typical applications include cuffs, storm flaps, knees, and the bottom of backpacks.

Regular Kevlar fibers are used in pants to provide protection without restricting movement or flexibility, while stretch Kevlar is used in products such as jackets for abrasion protection with a fixed shape. All aramid fabrics used are Bluesign approved.


- Wool blend for performance and warmth -

Wooloo is a wool fabric that encompasses the process of recycling wool and recycled wool fibres.

Wool absorbs moisture, retains warmth, and resists odor better than any other material. Recycled wool needs to compensate for fiber length loss during the recycling process, so adding a small amount of synthetic fiber before spinning can increase the durability of the resulting yarn.

The parts that come into contact with the skin are made from 100% merino wool, which is known for its high quality, softness and ability to regulate body temperature even during intense exercise. Wool fibers have scales, and we use a unique chlorine-free process to remove these scales and make them soft and comfortable.

Klettalmusen wool is always 100% mulesing and chlorine-free.

Hirsutum Organic Cotton

- Environmentally and socially responsible organic cotton -

Hillstum is a unique technical cotton material used in our products.

At Klettalmusen, we only use organic cotton to reduce our impact on the environment. Traditional cotton is considered one of the most polluted crops due to the extensive use of pesticides and insecticides during production. There are also concerns about worker rights, child labor and unsustainable water consumption.

Organic cotton is grown without the use of pesticides, chemical fertilizers or genetically modified crops. Instead, we use methods such as beneficial insects and mechanical weeding to reduce the environmental impact on crops. Cultivation is carried out in an environmentally responsible manner, protecting workers from harmful chemicals during operations and protecting surrounding communities by preventing contamination of drinking water.

Our material complies with two third-party certifications for organic cotton: GOTS certification, the world's highest level of certification for organic cotton, and the EU Council's Organic Agriculture Directive.

Levitend & Retina

- Levitend & Retina strong polyamide material -

Polyamide (nylon) is an extremely durable and versatile fiber. Levitent is a polyamide-based fabric used in apparel. Although Retina fabric is based on polyamide, it is intended for use in backpacks, which imposes different requirements on the fabric.

The polyamide we use is made from a variety of recycled materials, including bio-based raw materials and virgin raw materials.

Oculus & Molle

- Polyester for smooth performance -

Polyester has properties that make it attractive for outdoor use in both apparel and packs. The polyester-based fabric used for the apparel is from Oculus, and the material used for the pack is from Mole.



- Global standard for highly safe environmental hygiene -

Bluesign is a standard for environmental health and safety in textile manufacturing. Bluesign provides independent audits to textile mills, scrutinizing manufacturing processes from raw materials and energy inputs to water and air emissions.

Bluesign helps us manage our supply chain and select manufacturing partners based on their commitment to safety and the environment.

The Bluesign approval for Klättalmusen fabrics means that we use materials and technologies that save resources and minimize environmental impact, ensuring the highest consumer safety standards. It means that it complies with the standards. Klettalmusen has been a Bluesign System Partner since 2007.

Box Construction

- Box structure down insulation structure -

All Klettalmusen down products have a box construction. Rather than having through-seams, the inner sidewall is used to distribute the down evenly.

Most down products on the market have a single seam between the outer fabric and the inner fabric, which creates thousands of tiny holes that allow air to pass through and eliminate much of the insulating properties of down. Masu.

Box construction creates a completely windproof layer that maximizes the warmth of goose down, resulting in down clothing with no cold spots or wind leaks. Box construction combined with 800+ fill power down provides superior thermal efficiency at significantly less weight than traditional construction methods.


- World standard for organic fibers -

The Global Organic Textile Standard (GOTS) is a global textile processing standard for organic fibers. Both ecological and social criteria are taken into account and backed up by independent certification of the entire textile supply chain.

The GOTS standard covers the processing, manufacturing, packaging, labeling, trading and distribution of all textiles made from at least 70% certified organic natural fibres. End products include textiles, yarns, fabrics, clothing, and household textiles.

GOTS aims to define globally accepted requirements for textile products. From the harvesting of raw materials to environmentally and socially responsible manufacturing and labeling, we aim to provide end consumers with a level of assurance they can trust.

Durable Water Repellent

- 100% fluorine-free DWR processing -

A durable water repellent finish, commonly referred to as DWR, is a process that creates a water-repellent (hydrophobic) surface on fabrics. Water-repellent treatments prevent fabrics from becoming saturated with water, which affects the functionality and feel of the garment.

All types of DWR become less effective over time due to wear, washing, and UV radiation from the sun. This type of aging requires re-protecting the fabric through home washing or spraying with DWR.

Klettalmusen uses 100% fluorine-free DWR. Klettalmuhsen was the first outdoor company to completely remove PFOA (one of the most harmful fluorocarbons) from all its clothing, already in 2008.

Fluorocarbons are commonly used because they are technically effective, but they are also endocrine disruptors that have been shown to cause reproductive harm. Fluorocarbons are a serious problem in the natural world and in an outdoor industry that professes to care for nature.


- Unique reinforcing treatment to increase durability -

Duracoat is a unique surface treatment developed by Klettalmusen that improves the durability of areas subject to heavy wear. By applying it to particularly vulnerable areas such as shoulders and elbows, it improves abrasion resistance by up to 5 times.

Duracoat is a surface treatment that improves durability while maintaining flexibility without adding extra seams or layers of fabric. This increases durability without adding weight to the garment or weakening the fabric at the seams. With the same cut and structure, it maintains its shape and does not hinder movement, allowing for the agile movement required by climbers.

Duracoat has become a symbol of the Klettalmusen tradition of scientific know-how and innovative thinking.


- Professional Rescue Search Detector -

With the RECCO Rescue Reflector, you can be searched by professional rescue personnel equipped with RECCO detectors in the event of an avalanche accident or when you are lost outdoors.

Most Klettalmusen shell jackets and pants are equipped with RECCO reflectors and do not require power or activation to function. RECCO technology is not a replacement for beacons (avalanche transceivers).

Butterfly Bridge

- Harness load transfer system -

Klettalmusen's butterfly bridge harness system is based on the principle of "carrying with bones, not muscles." Instead of traditional solutions, butterfly bridges implement a load transfer system that distributes the load over a wider area.

By applying load to the bone protrusions, we avoid obstructing blood circulation to the muscles and allow them to move more freely. As a result, your circulation can work unimpeded, reducing pain and fatigue.

The butterfly bridge system is especially useful for trekkers who support heavier loads than normal.

4-S system

- Lightweight load transfer system -

Klettalmusen's latest chest strap feature. Replacing the traditional sternum strap with a cord system provides greater adjustability and control.

The cord can be freely placed using the loop webbing system. This adjustability makes it easy to adjust the tension and allows for quick changes on the move.

Lightweight cords and hooks transform a traditional static sternum strap into a dynamic tool.

V3 Pivot Harness System

- Lightweight load transfer system -

The V3 Pivot Harness System is a lighter weight update of Klettalmusen's popular Pivot Carrying System. This reduction in weight means it is no longer as heavy or complex as previous versions.

The hipbelt pivots independently of the backpack, allowing the belt to move with your hips with each step. Rather than lifting the entire side of the backpack, the weight is carried at the pivot point. The pivot also puts the weight of the backpack directly on your lower back, reducing strain. Fixed loop construction allows for easy adjustment regardless of height.


- Backpack protection -

Skycoat coating is a surface coating applied to the interior of backpacks and packs that improves water and moisture resistance. By applying the treatment to the fabric itself, we directly improve the longevity and performance of the treatment.

[MFR - The Mass Flow Resistance System]

Klettalmusen's MFR system is an indicator that helps you decide what equipment to choose for your next activity. This metric will help you decide what kind of equipment to bring for any activity or weather.

Modern outdoor gear uses a wide range of different materials with different properties. Among these, Klättalmusen places the utmost importance on "air permeability." Breathability is the most important property to consider when developing equipment with maximum resistance in outdoor environments. The MFR system was created to put ventilation in our equipment into a larger context.

Mass Flow: Mass flow is a technical concept that describes how easily air passes through a fabric. Resistance: A fabric's resistance to breathability determines how well outside air cools the body and how efficiently it transports moisture away from the body. The greater the resistance, the more air is trapped and warmer, but the moisture is not evacuated as efficiently. System: For mountaineers, the type of equipment they choose to bring depends on the environmental conditions and the technical needs of the climb. Bringing everything is not a realistic option.

Klettalmusen has systematized all products into numerical values. By combining equipment with different MFR values, you can choose equipment to suit the adventure at hand.

MFR 1 : Very limited wind resistance

Limited wind resistance = Garment that is not wind resistant but highly breathable. A first layer that prioritizes releasing heat and moisture from the body to the outside.

MFR 4: Fair wind resistance

Moderate wind resistance = Garment that is wind resistant enough to suppress outside winds. It retains airflow, making it a great layer for summer activities that require breathability.

MFR 6 : Good wind resistance

The most balanced garment that combines wind resistance and breathability. A mid-layer in nature that blocks external wind and is breathable.

MFR 8 : Excellent wind resistance

Extremely wind resistant = A garment that prioritizes wind resistance. For insulation and windproof outerwear where you want to prioritize windstorms and heat retention over breathability.

MFR 10 : Windproof & waterproof

Completely windproof and completely waterproof = A completely stormproof and waterproof garment that only ensures moisture permeability while completely blocking airflow. For shell outer layer in extreme environments.

[HCR - Heat Conductivity Resistance]

HCR is a performance value for cold weather gear that we developed, and measures warmth on a scale of 3 to 9, with 9 being the warmest. The choice of warmth is always a personal one and should also be balanced against the intended activity and needs for flexibility and agility in the field. HCR can provide a simple reference that combines insulation differences, external conditions and body sensitivities. Whether it's light warmth for active activities or complete warmth in the extreme climates of Scandinavia and the Arctic, the purpose will determine how HCR is applied.

HCR 3 : Active Versatile

- Temperature +10°C to -10°C
- Breathable layer that provides warmth and protection
- Made for year-round on-the-go activities
- Mainly recycled or bio-based synthetic fiber insulation, with excellent thermogravimetric ratio and excellent reactivity in humid environments
- It has the advantage of retaining heat even in damp conditions.
- Demonstrates excellent durability under various environments
- More compact, better-fitting and more versatile than down

HCR 5 : Core Warmth

- Temperature 0℃ ~ -20℃
- Designed to provide everyday warmth to keep you warm even during periods of inactivity.
- Uses down (RDS certified product) for filling, realizing a material with excellent lightness, compressibility, and durability.
- Loose-fitting clothing that can be layered over other layering items

- Ideal for cold and dry environments

HCR 7 : Nordic Winter

- Temperature -10℃ to -25℃
- Inspired by the Nordic winter environment and created for everyday warmth
- Uses down (RDS certified product) for filling, ensuring sustainable performance while achieving lightweight and excellent compressibility.
- Reinforced with recycled or bio-based synthetic insulation for added warmth
- Loose-fitting clothing that can be layered over other layering items
- Ideal for cold and dry environments

HCR 9 : Arctic Extreme

- Temperature -25℃ ~
- Designed for survival and work environments in some of the coldest and harshest environments on Earth

- Uses down (RDS certified product) for filling, ensuring sustainable performance while achieving lightweight and excellent compressibility.
- Recycled or bio-based synthetic insulation used as reinforcement for complete warmth
- Loose-fitting clothing that can be layered over other layering items
- 2L Cutan® fabric with MFR10 ensures complete wind and waterproof protection