Warm and sustainable sleeping bag perfect for your next cold backpacking adventure
Designed with ExpeDry water-repellent technology that increases your bag's down performance while reducing drying time
ISO-tested comfort level that's right around freezing
Anti-snag slider on main zipper
Fold down second zipper provides added ventilation and easy access in and out of the bag
Super packable 800-fill power down bag is ultralightweight and easy to carry in your pack
Can convert into a bivvy or a lofty trunk or rooftop snoozer
Anatomically designed footbox with wrap-around construction increases warmth
Smooth, curved baffles reduce down from shifting and increase durability to reduce inconsistent heating inside the bag
Fixed hood gives you full coverage
Brand : Marmot
Country of Origin : Imported
Web ID: 23MRMUHLMXXXXXXXXCSL
SKU: 24990022
Size
Regular
Long
Shape
Mummy
Mummy
Minimum Trail Weight
2 lbs. 2.7 oz.
2 lbs. 6 oz.
Temp Rating
15°F
15°F
Insulation Type
Down
Down
Power Fill
800
800
Shoulder Girth
61 in.
63 in.
Hip Girth
55.9 in.
57.9 in.
Foot Girth
39 in.
40.9 in.
Zipper Location
Left
Left
Stuff Sack Included
Yes
Yes
Stuff Sack Size
14.2 x 7.1 in.
14.2 X 7.1 in.
REVIEWS
5.0
100%
Recommended
14 Reviews
will1985
Verified Purchase
1 month ago
Love This Bag
[This review was collected as part of a promotion.] super light, and for the first time ever, I could sleep without a beanie and socks (admittedly, I'm a baby about the cold). love this bag. highly recommend.
cricket2722
Verified Purchase
2 months ago
Fantastic Sleeping Bag!
[This review was collected as part of a promotion.] Everything as described. Very happy with this sleeping bag. Would recommend!
Verified Purchase
4 months ago
Helium Down 15
So much of an improvement over my older bag (which I can still use for warmer temps). Very soft and warm and packable. Short zip on opposite side from main zip is a great feature I've never had before, and a great way to start out the night before temps drop.
Verified Purchase
5 months ago
Very Warm!
Great value and very warm! Great bag for 4 season use.
Eric504
Verified Purchase
8 months ago
Lightweight & Warm
[This review was collected as part of a promotion.] Lightweight yet warm; ideal when every ounce counts.
HighlanderNorth
9 months ago
Great Sleeping Bag That's Lasted Me 17 Years
[This review was collected as part of a promotion.] I bought my Marmot Helium 15° bag in early 2008 for a February backpacking trip to the Pennsylvania Appalachian Trail. The late 2007/early 2008 version of this bag is filled with 850 fill down, and is a single
shade of medium blue. It's outer covering is silky-smooth.
Even today, after being stored in a non-environmentally controlled storage unit for 14 years, the bag feels like a silk-lined cloud. I've slept in it probably 100 nights,
So its due for its first full laundromat wash and tumble dry session
to properly redistribute it's down.
I accidentally left it packed inside its compression sack from May til November 2025 as well. But it's still warm in mid-
upper 20° conditions without being cleaned
and refluffed.
Brad775
1 year ago
Love It
[This review was collected as part of a promotion.] Great bag, light weight, keeps me warm, haved used for years from Mount Whitney to Yosemite
Would recommend it to anyone
Scoots
1 year ago
Dyno-mite
[This review was collected as part of a promotion.] Kept me warm and cozy on so many levels. To car camping in the ADK in the dead of winter to winter camping near Stowe. Great investment. Highly recommend
EMAN
Verified Purchase
1 year ago
The New Bag
[This review was collected as part of a promotion.] Lots of good to say about this bag. Very comfortable and packs down plenty. Easy to use zipper and adjustments around the top. Have yet to put it to the test outdoors, but look forward to many cozy nights.
Spiffy
1 year ago
Awesome Starter And Finisher
[This review was collected as part of a promotion.] Loved snuggling into this Absolute beast I cannot state enough how clutch this came in
trainrunner238
1 year ago
Comfy In The Cold
[This review was collected as part of a promotion.] Warm, lightweight, and compressible, this 15° sleeping bag is ideal for chilly nights. The insulation traps heat effectively, and the zipper doesn't snag. Perfect for backpacking or camping when temperatures drop but you still want packability and comfort.
Loria
Verified Purchase
1 year ago
Great Sleeping Bag
[This review was collected as part of a promotion.] Bought this as a gift for my son, he loves it and said it. He says it will be perfect for his backpacking trips and/or camping. Is lightweight. He is 6'5" and he says it fits him well.
Avrula
Verified Purchase
2 years ago
Excellent Night Of Sleep
[This review was collected as part of a promotion.] Soft as butter, toasty warm, light as a feather. This is a go to back for cold backcountry.
cgolkie
Verified Purchase
2 years ago
Very Light And Very Warm!
[This review was collected as part of a promotion.] Purchased this bag for shoulder season backpacking in Colorado. I used it for the firsttime last weekend. Night time temps got down to around 28F and this bag kept me toasty and feeling warm all through the night. It is incredibly light weight considering the fill and has a nice feel to the material. The only thing I would change is to have the secondary foot zipper extend further into the foot box area. It doesn't expel heat fast enough if you run warm.
