Snowline Down Trousers

Lightweight down trousers with a fully waterproof taped shell. Enabling winter mountaineers, ice climbers, trekkers, and ski tourers to cope with conditions above and below the snowline.

Typical Operating Temperature
Guideline minimum temperature. Sleeping Bag TOT: you should get a night’s sleep, under normal circumstances. Clothing TOT: you should feel warm enough, assuming low/moderate activity. Sleep System TOT: relates to full system. For more details, see our Technical Briefing.
-15°C / 5°F
For clothing, weight is for size: M. For sleeping bags, weight changes with selected length/width. N.B. there may be some variation in the weights of finished products.
450g / 16oz
Snowline Down Trousers


  • Down trousers with a waterproof shell
  • Rare 950 fillpower European Goose down
  • Outer: Fully-taped waterproof HS2 fabric
  • Inner fabric: Superlight MX
  • Stitch-through construction for lightness
  • Small security pocket
  • Adjustable shock-cord at waist
  • Ankle zips with insulated underbaffle
  • Stuff sac
  • Pack size: 13 x 21cm*
  • Options:
    • Extra small to Extra large sizes
    • Custom sizes
    • Colour: Black, Light Navy and Red


* Please note: we make our stuff sacs big enough to allow fairly easy stuffing rather than reducing clothing to the tightest minimum.


A whiteout on the plateau can turn to rain lower down the mountain. With their fully-taped waterproof shell, our Snowline trousers help seal out the worst of these changeable conditions for winter mountaineers, ice climbers, trekkers and ski tourers.

The HS2 fabric used to make the fully-taped outer shell has a hydrostatic head of 30,000mm and a moisture vapour permeability of 20,000g/m2/24h making it highly waterproof and breathable. It has proved itself to be outstanding on the biggest and coldest mountains of the world. The YKK Aquaguard water-resistant zips – backed by an insulated under-baffle – help keep the air and water out, and the heat in.

Lighter than carrying down trousers and waterproof trousers separately, the Snowlines pack into a 13 x 21 cm stuff sac (supplied) taking up minimum space in your rucksack.


Also available in custom sizes. We make clothing to order, so if you’re not a standard size we can make it to fit. To order a non-standard custom size, select the Custom Sizing tab and choose the waist and inside leg sizes that work for you. A custom size takes us a little longer (typically two weeks longer) to make and, because it’s personalized, it’s non-returnable and our customer loyalty scheme can’t be applied.

Superlight MX fabric (weight: 32 gsm)

A mini-ripstop nylon with excellent tear strength, MX is the pick of the superfine 15 denier downproof materials. We have tested lighter fabrics, but most have had significant drawbacks, while our confidence in MX is based on several years of extensive use in both our ultralight and our high mountain gear.

950 fillpower down

A newcomer to our range. European goose of rare quality. A high value alternative at the top levels of performance. More on our down insulation.

Waterproof HS2 outer fabric (weight: 88 gsm)

HS2 is a 2-layer laminate, a high-spec option for the outer layer of our insulated gear. This ripstop fabric strikes an excellent balance between lightness and durability. It is light enough for our Belay tops and tough enough for expedition use in our Omega clothing, while the Kappa clothing makes full use of both its qualities. HS2 is completely waterproof (when the seams are taped) and offers excellent breathability. (Weight: 88gsm).

Works well with
From £790.00 670g -15℃
A lightweight down jacket with a fully waterproof taped shell, to cope with all...
From £164.00 150g
Primaloft-filled mountaineering mitts. Confidence and warmth in cold and wet conditions.
From £780.00 645g -15℃
A lightweight down smock with a fully waterproof taped shell, to cope with all...