Helium 15

$278.82 - $324.32
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Refuel on your next below-freezing backpacking adventure in the ultralight, eco-friendly gas bags, featuring a new sustainable ExpeDry water-repellent technology that increases performance and reduces the drying time of your down bag. With an optimal ISO-tested comfort well below freezing, the Helium 15° Sleeping Bag will keep you toasty from head to toe in a super-packable 800-fill-power down bag designed to easily stuff into any overnight pack. A thru-hiking favorite, the new gas bags provide lightweight warmth that's light on the Earth—perfect when you're looking to maximize miles or speed in the mountains and minimize weight and space in your pack. If going tent-less is in the plan, you can count on the quick-drying ExpeDry to perform as a bivvy sack on cold, wet, or snowy ground or ledges.


Brand Name:
Bag Style:
Seasonal Usage:
Three Season
Temp Rating:
15° F
Temp Rating Celsius:
-9° C
EN Lower Limit (Men's Rating):
13.5° F / -10.3° C
EN Comfort (Women's Rating):
25.2° F / -3.8° C
Bag Length:
Reg: fits users up to 6 ft
Long: fits users up to 6 ft 6 in
Fill Weight:
Reg: 19.8 oz (560 g)
Long: 22 oz (625 g)
Bag Loft:
6 in
Bag Shell Material:
Pertex Microlight 20d 100% Nylon Ripstop DWR 1.03 oz/yd
Bag Lining Material:
30d 100% Nylon DWR 1.09 oz/yd
800+ Fill Power Goose Down
Reg: 2 lbs 1 oz (935 g)
Long: 2 lbs 4.5 oz (1040 g)
Circumference at Chest:
Reg: 61 in
Long: 63 in
Circumference at Hips:
Reg: 56 in
Long: 58 in
Circumference at Foot:
Reg: 39 in
Long: 41 in
Other Features:
  • Anatomically Designed Footbox with Wrap-Around Construction increases Warmth
  • Smooth-Curved Baffles Reduce Down Shifting. Nautilus Multi-Baffle Hood limits heat loss
  • Ultralight Pertex Microlight shell fabric
  • Full Length Locking YKK Two Way Zipper with Zip-Guard Slider
  • Fold-Down Second Zipper Provides added Ventilation, Easy Access. Anti-Snag Slider reduces Snagging
  • Down Defender to Improve Water-Resistance in Wet Conditions
  • Internal Stash Pocket
  • Snagless Insulated Draft Tube
  • Two Way Zipper Sliders
  • Hood Drawcord
  • Zipper Garage
  • Stretch Tricot Baffles
  • Two Hang Loops
  • Stuff and Storage Sack Included
  • EN Tested

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