Marmot Helium 15 Sleeping Bag

About This Item

Temp Rating

15 to 30 Degrees

Insulation Type

Down

DESIGN & DETAILS:

  • 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
SizeRegularLong
ShapeMummyMummy
Minimum Trail Weight2 lbs. 2.7 oz.2 lbs. 6 oz.
Temp Rating15°F 15°F
Insulation TypeDownDown
Power Fill800800
Shoulder Girth61 in.63 in.
Hip Girth55.9 in.57.9 in.
Foot Girth39 in.40.9 in.
Zipper LocationLeftLeft
Stuff Sack IncludedYesYes
Stuff Sack Size14.2 x 7.1 in.14.2 X 7.1 in.

REVIEWS

5.0
100%
Recommended

12 Reviews

Verified Purchase

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

Very Warm!

Great value and very warm! Great bag for 4 season use.

Verified Purchase

Lightweight & Warm

Lightweight yet warm; ideal when every ounce counts.

Received incentive

Great Sleeping Bag That's Lasted Me 17 Years

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.

Received incentive

Love It

Great bag, light weight, keeps me warm, haved used for years from Mount Whitney to Yosemite Would recommend it to anyone

Received incentive

Dyno-mite

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

Verified Purchase

The New Bag

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.

Received incentive

Awesome Starter And Finisher

Loved snuggling into this Absolute beast I cannot state enough how clutch this came in

Received incentive

Comfy In The Cold

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.

Verified Purchase

Great Sleeping Bag

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.

Verified Purchase

Excellent Night Of Sleep

Soft as butter, toasty warm, light as a feather. This is a go to back for cold backcountry.

Verified Purchase

Very Light And Very Warm!

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.

Read All Reviews (12)