The Helios Pants are a great addition to your pack for alpine ascents or ski touring. Full length separating side zips allow you to quickly put them on in the field without having to step out of your skis or remove your boots and crampons, a crucial feature on steep slopes and in frigid conditions. Packed with premium 900+ fill power goose down, the Helios Pants are a cozy treat at the end of a long day and a necessity in cold conditions.
We recommend sizing up a full size for down pants if you plan to wear over any layers.
Ideal for: ski touring, winter camping, winter in Fairbanks, cold mountaineering
Details
- Sewn-through construction
- YKK full length 2-way separating side zips
- Snaps at ankle and knee
- Lycra bound elastic waist band with 2 stage snap adjustment
- Lycra cuffs
- Made in Seattle, USA of imported materials
Additional Info
| Garment Fit |
Relaxed Midweight |
|---|---|
| Garment Type | Midweight Down Pants |
| Shell |
20d x 20d Pertex® Quantum Pro® brushed nylon (41 g/m2), made from 60% bio-based materials. The durable water repellent (DWR) finish on our Helios pants is made without intentionally added perfluorinated chemicals (PFCs/PFAS). |
| Lining Material |
20d nylon taffeta made from recycled nylon |
| Fill Power |
900+ Goose Down certified to the Responsible Down Standard (RDS) by TE-00118388 |
| Fill Weight | 4.4 oz / 126 g (size Medium) |
| Average Weight | 13 oz / 368 g (size Medium) |
| Packed Size | 4L |
| Origin | Made in Seattle, USA of imported materials |
Certified to the RDS
Our down apparel contain 100% Responsible Down Standard (RDS) down fill.
Certified to the Responsible Down Standard by TE-99977174.
Reviews
Customer Reviews
4.8 Based on 8 Reviews
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H
01/12/2025
Heather
United Statesnot fit for women
While these are an awesome product, high quality and durable, the unisex sizing does not fair for women. I am not an extra curvy figure. 5' 7.5'', 155# winter weight. Toned, evenly proportioned. Size 4 & 6 in toad & co Pants. I sized up to size Large in these down pants to accommodate hips, and while they will work, they are still uncomfortably tight through the hips and butt. I do not recommend these pants to women. 5 stars for what the product is. 2 stars for fit, as applied to women.
MS
02/20/2025
Mark S.
United StatesHelios Down Pants
I am 5’8”, 165 lb. and am typically a size M but the website suggests sizing up to wear over layers so I ordered size L. L was correct for my use. Note that there is no zippered fly. Their actual weight is 0.9 lb. I estimate their packed volume to be substantially less than the stated 4L.
JM
02/21/2025
Jon M.
United StatesAmazing
These pants are as advertised - just perfect for warmth and easy to get on and off with the full length zippers
MS
03/12/2025
Michael S.
United StatesAmazing Down Pants
Used these for base-camp warmth during a recent winter climbing trip. Perfect fit and outstanding warmth.
VS
11/22/2025
veronica s.
ArgentinaUnbeatable warmth in extreme conditions
These down pants are absolutely excellent. The quality is outstanding — warm, lightweight, and incredibly comfortable. They pack down easily without losing loft, and the materials feel durable and premium. Perfect for camping in high-altitude conditions — they kept me warm inside the tent even in very low temperatures. I’m extremely satisfied and would highly recommend them. I’m 1.62 m tall and weigh 53 kg, and the size S fit perfectly. I can even wear a pair of pants underneath.