Quality packable summer waterproof: Klättermusen Asynja reviewed

Jun 11, 2021 BY Mark Pawlak

With summer coming you’re probably looking more to a quality packable summer waterproof than a heavy do-it-all jacket, in the Klättermusen Asynja reviewed here we’ve a high-spec version that brings style with functionality.

Climber wearing yellow Asynja jacket

Image: Teo Poggi @teogiovannipoggi

Buying a quality packable summer waterproof

I find it’s helpful to think what you want gear for, rather than what it does, or how it’s advertised. Tech specs can be impressive, but there’s much more to consider. In this case we are looking at a jacket designed to be a quality packable summer waterproof. So what exactly should it do?

We are after a light jacket that packs small but doesn’t compromise protection in heavy summer showers. Value for money is still key, so as it’s an expensive jacket at £232 / 3600 Kr, we’ll look beyond the tech specs to see what it is you’d be paying for.

Man walking in mountains wearing black waterproof

Klättermusen Asynja Reviewed: First Impressions

First impressions: it’s light – and the packaging is re-useable (thumbs up). It’s a very good fit (the sizing guide on their site was spot on). Unlike other shell jackets, the inside of the material feels somehow softer – I might just be fooled here by the material on the inside of the cuffs, but it’s a good first impression.

What I like about the Klättermusen Asynja

  • Eco credentials and considerate design
  • Cut and fit – active but not athletic
  • Design touches and toggles
  • Excellent performance ratings
  • Fabric feel
  • Packable but sufficiently practical
  • Best hood I’ve tried

What I don’t like about it

  • Price – could be justified, but based on form as much as function.
  • Ventilation pockets – can you really have both?

Klättermusen Asynja material and tech-spec

  • Material: 3-layer Cutan PTFE-free and Windstretch with eco-credentials
  • Weight: 347g (medium)
  • Pack size: Small
  • Waterproof: 20,000gm WP
  • Breathability: 20,000gm moisture vapor permeability
  • Pockets: 2 lower cutting high to help rucksack fit
  • Hood: fully adjustable for a helmet

Hod of Asynja jacket

Wearing the Klättermusen Asynja

The cut is excellent, which was a surprise as I thought it’s got to be too close – I’m considerably larger in most proportions that the people on the company website. Yes, it’s fitted – but if like me that’s something you immediately put back on the rack, don’t worry – it’s only a little fitted, and it’s fitted in all the right places.

What stands out is the excellent balance of elastic material in the jacket. It’s a quality packable summer waterproof jacket, but with just a little stretch. This really helped me feel a connection to the jacket, rather than it just be a shell to throw over when the rain falls.

It also feels a lot tougher than its weight might suggest (347g), something which will see it used more day-to-day than just packed away for this summer’s trekking holidays.

Using hand pockets of waterproof jacket

Let’s talk about pockets…

My only gripe here – and it’s not exclusive to this jacket – is the use of pockets as ventilation. Personally, I want them to be separate. With the waist belt fastened you do get both, but it’s really a compromise and I don’t like keeping valuables in pockets that are any way open when out walking.

There could be an easy solution, though… the company could have simple elastic pouches inside the pockets, perhaps one for a phone and another for a small wallet. Just a suggestion. It’s this or maybe find a workaround and have a small external pouch on your rucksack or belt?

Form or Function?

I’ve long complained about dull outdoor products – especially in the colour options – but, like many people I’ll usually always lean towards a jacket that’s practical, rather than cool. In this case I can forgive the Klättermusen Asynja on price a little as not only does it do the job, it’s also super-stylish.

One look at the company website, and across its product range, and you’ll find wonderful designs and creative interpretations of age-old products. At this level, I’m now very interested in this brand. ‘Cool’ and ‘outdoor gear’ often don’t appear in the same sentence. With Klättermusen they should.

Black wrist cuffs of Klattermouse jacket reviewed here

Klättermusen Asynja: Eco credentials

It’s great to see more companies considering the manufacturing process and its impact. Klättermusen says it has always done this and on investigation, its eco-credentials do add up.

The jacket is a bluesign product – something we verified with them. This means it’s made with the lowest possible impact on people and the environment and with a responsible use of resources.

Let’s have a look at Cutan, the company’s proprietary material used in the Klättermusen Asynja: The jacket is made from 3-layer Cutan, created from 100% recycled polyamide and reinforced with light Windstretch (85% recycled polyamide and 15% elastane).

Cutan is a PTFE-free membrane which is PFC- free. Like many outdoor materials it has a waterproof coating and it’s these which degrade over time, passing pollutants into nature. The company avoids this by using a coating which is PFC-free. Here’s a useful post by Ultralight Outdoor Gear explaining why is PFC-free important.

Klattermusen waterproof jacket in yellow

Klättermusen Asynja review: Summary

It’s an excellent jacket that can easily find its way out of your rucksack and onto your coat rack. Quality materials, fit and design are all solid reasons for buying it. However, there are cheaper alternatives. Ultimately, if you accept that even with quality packable summer jackets, features might be limited and you’re paying a little premium for style,  it’s an interesting choice.

I hope you found this Klättermusen Asynja review useful. If you’d like to get your hands on this jacket it’s available in Brush Green, Dirty Yellow and Raven shown here. It retails at aprox UK £232 and you can find out more here about the Klättermusen Asynja.

Oh, and a Klättermusen is a climbing mouse!


Camping, eBiking, Hiking, Ice Climbing, Mountain Biking, Mountaineering, Multi Activity, Trekking, Via Ferrata
Breathable, packable, Shell Jacket, Waterproof jacket

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