Klättermusen Durin 2.0 Pants Review

Overview

The Durin 2.0 is Klättermusen’s do-everything hardshell pant, built around a 3-layer Cutan fabric and reinforced heavily at the seat and lower legs. It’s aimed squarely at people who spend long days kicking steps, skinning, or paddling in genuinely wet, abrasive conditions — think ice climbing, ski touring, glacier travel, and canoeing — rather than at ultralight backpackers looking to shave grams off a 3-season kit. If you’ve ever worn through a pair of rain pants after two seasons of scrambling over rock and crampon buckles, this is the category of pant designed to solve that problem.

Key Specs

Spec	Detail
Shell fabric	3L Cutan® 225 g/m², 100% Ultramid® Bio-Mass Balanced Polyamide (bluesign® approved)
Waterproofing	>20,000 mm
Breathability	20,000 g/m² MVP
Weight	844 g (size M)
Lower leg reinforcement	Duracoat™ & Heavy Duracoat™
Inside lower leg reinforcement	Icebreaker RP, 100% recycled polyester
Rear reinforcement	WindStretch™ (68% Ultramid Bio-Mass Balanced Polyamide / 20% polyester / 12% elastane)
PFC status	Fluorocarbon-free
Country of manufacture	Vietnam

Performance

Waterproofing and breathability. On paper, the numbers here are solid but not chart-topping: >20,000mm hydrostatic head and 20,000 g/m² MVP put the Durin 2.0 in the same tier as most mid-tier Gore-Tex and eVent competitors rather than at the bleeding edge. In practice, a 3-layer Cutan laminate at 225 g/m² is a fairly substantial face fabric — heavier than the 40–70 g/m² fabrics you’d see on an ultralight rain shell — so I’d expect it to hold up to sustained downpours and wind-driven snow better than it sheds condensation on a hard uphill push. These are described as offering the weatherproof benefits of three-layer Cutan with reinforcements adapted for hard work, and are marketed as totally waterproof pants for hard use. The two-way side vents with internal storm flaps are the main tool for dumping heat on the way up before you need it on the way down.

Durability — this is the pant’s whole reason for existing. The pants are reinforced over the seat for durability and moisture protection, and over the lower legs to withstand boot buckles and other abrasive equipment. That’s a deliberate design choice: crampon points, ski edges, and glissading on scree are exactly what kills most shell pants at the ankle and seat first. The fabric on the inner lower leg is slick to prevent snow from sticking, and the lower 25 cm of the inner leg is reinforced to protect the membrane from boot buckles, skis, and other equipment. The seat itself gets a double treatment — reinforced with both WindStretch™ and Duracoat™ for durability and water resistance — which is the detail that tells you Klättermusen designed this around glissading and sitting on wet rock, not just standing around in a parking lot rainstorm.

Fit and mobility. A diamond-shaped gusset at the crotch and pre-bent knees are built in for maximum freedom of movement, which matters a lot when you’re high-stepping over a bergschrund or bootpacking a couloir. The extended leg length is worth noting if you’re used to standard hiking pants — Klättermusen’s shell pants have an extended leg length to provide extra protection over boots, and the hem can be paired with the optional Gaiters Kit for a full gaiter seal — so expect to hem or cuff them if you’re not running mountaineering boots underneath.

Storage. Two hand pockets and two leg pockets with zippers are provided, and the leg pockets use a bellows construction to expand for larger items. That’s a genuinely useful detail on a mountaineering pant — map, gloves, a snack, all accessible without stopping to dig through a pack.

Independent user feedback is thin. I wasn’t able to find much in the way of long-term Reddit, BPL, or CleverHiker field reports specifically on the Durin 2.0 — this is a niche, mountaineering-focused SKU rather than a mainstream thru-hiking staple, and Klättermusen’s US/UK retail footprint is still fairly small. What I can say with more confidence comes from the brand’s broader reputation: reviewers testing other Klättermusen pants (the Gere 2.0 and Gefjon 2.0) consistently praise the build quality and attention to detail, and one reviewer noted the brand’s high expectations were warranted, expecting a premium Swedish brand to be creating very high spec products. Take the Durin-specific performance claims above as coming mostly from Klättermusen and its retail partners rather than independent long-term testing — worth keeping in mind before you commit $300+ to a pair.

Pros & Cons

Pros

• Genuinely hard-wearing 225 g/m² 3L shell with dedicated seat and lower-leg reinforcement — built for abrasion, not just rain
• Fluorocarbon-free DWR and bio-based Ultramid face fabric, a rare combo of durability and a lighter environmental footprint
• Bellowed leg pockets and two-way ventilation zips are thoughtful, field-tested details
• Gaiter-compatible hem and pre-bent knees suit technical winter travel specifically

Cons

• At 844 g, this is a heavy pant for anyone doing 3-season backpacking or fastpacking — nearly double what an ultralight rain pant weighs
• Waterproof and breathability ratings are respectable but not exceptional compared to premium eVent or Gore-Tex Pro options at this price
• Very little independent long-term user testing available; most write-ups (including this one) lean on manufacturer specs
• Klättermusen’s limited retail presence in North America means sizing and returns can be more of a hassle than with mainstream brands

Who Should Buy This

The Durin 2.0 makes sense for ski tourers, ice climbers, and glacier travelers who need a shell that can take a beating from crampons, ski edges, and repeated glissading without shredding at the ankles — and who are willing to carry the weight penalty for that durability. It’s a poor match for anyone counting grams for a summer thru-hike; a 6–8 oz ultralight rain pant will serve that use case better. Think of the Durin 2.0 as workwear for winter mountains, not a backpacking rain layer.

Verdict

The Durin 2.0 is a purpose-built, reinforced shell pant that prioritizes durability and technical features over weight — exactly what you’d want for ice climbing or ski mountaineering, and exactly what you don’t want for ultralight backpacking. Given the strong reinforcement details and fluorocarbon-free construction, but tempered by the lack of independent long-term user reviews and a weight that rules out most 3-season hiking use, I’d put this at a 7.5/10 for its intended niche.