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Ymer 2.0


Immer 2.0 [75L+15L, 65L+12L]

Expedition Backpack

The ultimate expedition backpack developed for long trips. It can be used for adventures of four days or more in warm climates and has all the features to carry heavy loads in comfort. By including side pockets, it has a large capacity of 75-90L or more.

The distinctive Butterfly Bridge® carry-on-bone system is Klettalmusen's unique and robust carrying system, where most of the load is supported by bones rather than muscles. This reduces the strain on the muscles of your shoulders, neck, and lower back, and allows for smoother blood flow, allowing you to carry it on your back for long periods of time without stress.

The back system is height-adjustable with an external aluminum frame, and the padding is made of comfortable dual-density foam molded to your body and lined with mesh for added breathability. Additionally, the padded shoulder straps are secured from a single attachment point, allowing for lateral adjustment for a better fit over your shoulders. The hipbelt has waterproof and mesh pockets and rotates in one place as your hips move, giving you freedom of movement without having to lift the entire backpack with every step.

The expandable top lid has a large pocket for easy access and a smaller pocket inside, and can be removed to be used as a 12L daypack. A large L-shaped opening provides access to the main compartment, and an expandable zipper opening at the bottom allows you to store bulky items. Three rows of hole webbing on the outside allows for easy attachment of additional gear.

In 2009, Klettalmusen became the first outdoor company to use recycled polyamide in all its backpacks. Klettalmusen backpacks are made from fishing nets (used aquaculture and ghost fishing nets), fluff (used nylon carpet tops), plastic industrial waste, and scraps of thread and fabric. It is a 100% recycled product.

Click here to learn more about Klettalmusen fabrics and technology.

Key Features

・Carrying system that can be freely adjusted in height and width ・Butterfly bridge carry-on bone system developed exclusively by Klettalmusen ・Dual density foam inside the rotating hip belt ・Adjustable foam padded shoulder strap ・Back and Breathable spacer mesh on shoulder straps Waterproof hipbelt pocket Expandable bottom access with zipper Side bottle holder L-shaped zipper opening on main compartment Quick-attach bungee cord with cord lock Kevlar aramid Reinforced bottom - Loop webbing for attaching extra accessories - Hydration system compatible


- Weight: 2600 g (75L), 2550.5 g (65L)
- Water Column: > 1,500 mm
- Water Column: > 7,000 mm
- Dimension: H90 x W34 x D29 (75L), H83 x W48 x D28 (65L)
- Recommended Weight: 25 kg


Main Fabric:
Retina®, Econyl® 400D
40% Polyamide, 30% Post-Consumer Recycled Polyamide, 30% Pre-Consumer Recycled Polyamide, 400D, 251 g/m , PU Coating, SkylCoat, bluesign® Approved Fabric, GRS - Global Recycled Standard, Fluorocarbon free
The idea for Retina® 400 Denier Dobby was to create a fabric for use in mid-range packs with an emphasis on durability and sustainability. These packs are used for climbing, where you're carrying a heavy load for long periods of time on the trail, experiencing friction from the surrounding nature, and being dragged up against rock walls. In order to meet these demands, the fabric is made with a dobby structure, and the surface is coated with a sky coating (surface coating) to make it water repellent. By applying a coating in this way, the water repellent function can be maintained for a longer period of time. The back has a PU coating with a water pressure resistance of 1500mm. The surface fabric is made of 400 denier ECONYL® fabric. ECONYL® is a recycled yarn made from polyamide that is 50% post-consumer recycled and 50% pre-consumer recycled.
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.

65% Polyamide, 22% Polyester, 13% Aramid, 270 g/m², Kevlar® fiber.
By interweaving aramid fibers and elastic fibers, we create Kevlar® fabrics that are stretchy, soft, and highly durable. 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. All aramid fabrics used are Bluesign approved.

Backpack Technology:
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.

More Information of Klättermusen Fabric and Technology
Click here to learn more about Klettalmusen fabrics and technology.

Size Guide

- Designed for a long back body fit.
- Mid-weight design designed for heavy-duty trekking.
- The carrying system on the back is adjustable.
・Back length: 42-54cm.
・Back panel: Fixed panel, wide.

Size Chart

Measuring Guide

Back ultra measurement guide Locate the 7th vertebral body with your fingers. This is the part that sticks out when you tilt your head forward. It is important to keep your head straight when taking measurements. It might be a good idea to ask someone to help you. Start at the 7th vertebra and measure to the top of your hipbone. (Tip: Place a webbing belt around your lower back at the top of your hip bones so you know how far down to measure).

service & warranty
Product warranty

sputnik shop is the official importer and sole distributor in Japan of all the brands we sell.

We offer a variety of product warranties and services to help you purchase with confidence.

All purchased products come with free shipping, returns, and size exchanges. We also guarantee against damage after use.

Officially imported product

This is the official shop of the import sales agent.

1 year warranty
Product warranty

We provide a free warranty against product defects for one year after purchase.

crush replace
crash replace

Even if it gets damaged after use, it can be replaced under the guarantee system.

free exchange
Free replacement

Size exchange is possible within 7 days after purchase

free return
Free returns

Free returns available within 7 days of purchase

free shipping
free shipping

All products have free shipping within Japan.

Ymer 2.0