Snowline Down Smock

A lightweight down smock with a fully waterproof taped shell, to cope with all 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.
645g / 23oz
Snowline Down Smock


  • A down smock with a waterproof shell
  • Outer Fabric: Waterproof HS2 (as a fully-taped shell)
  • Inner Fabric: Superlight MX
  • Rare 950 fillpower European goose down
  • Box wall construction for more warmth
  • 3 insulated pockets:
    • 2 zipped waist level pockets
    • 1 zipped chest pocket
  • Integral hood with wired peak, sized for a helmet:
    • Adjustable front cord with ends tethered inside hood
    • Volume reducer on back of hood
  • Double-exit adjustable hem cord
  • Cuffs: adjustable Velcro tab
  • Stuff sac
  • Packed size: 17cm x 28cm*
  • Options:
    • Sizes: Extra small to Extra large
    • Custom sizes
    • Colour: Black, Red, Navy

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


White-out blizzard conditions on the plateau can turn to rain lower down the mountain, so our Snowline down smock – shelled in our waterproof, breathable HS2 fabric with fully taped seams, along with water-resistant Aquaguard zips – works to seal out the worst of these changeable conditions. The fully sized helmet compatible hood, insulated hand warmer and stash pockets, the two-way front zip and the reflective zip pulls all increase the performance for winter mountaineers, ice climbers, trekkers and ski tourers.

Just as useful ‘out and about’ while off the mountains, the ‘grab and go’ nature of a waterproof down smock is really handy, particularly to those of us in Northern Europe with our damp winters.

The fully taped HS2 fabric has a Hydrostatic Head of 30,000mm and a Moisture Vapour Permeability of 20,000g/m2/24h making it highly waterproof and breathable, and has proved itself to be outstanding on the biggest and coldest mountains of the world. And the YKK Aquaguard water-resistant zips – backed by an insulated under-baffle – work to minimize air and water ingress.

Lighter than carrying a separate down top and a full mountain waterproof jacket, the Snowline packs down into its own stuff sac to take up minimum space in your rucksack. 

* Relaunch offer cannot be used in combination with customer loyalty discount.

Please note: If you order a custom-sized version of this smock it will take longer (approximately 45 days) to be manufactured ready for dispatch. Custom-sized versions of this smock are not returnable and customer loyalty discount cannot be applied.

This smock is available in custom sizesSpecify Body Width, Body Length, and Arm Length independently to order a made-to-measure down smock. This tailor-made service can cope with sizes from XXXS to XXXL and is ideal if your chest/waist to height and/or arm ratios differ from standard, ready-to-wear patterns. 


Note: Video shows Jacket rather than Smock version of the Snowline:

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).

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