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Marmot Helium 15 Degree Sleeping Bag


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Availability: In Stock!

Ships Monday.

Availability: In Stock!

Ships Monday.
Item # MAR96203M
Compact and weighing just over 2 pounds, the Marmot Helium 15 Degree sleeping bag is an ideal choice for high-performance 3-season backpacking. An array of features and 800+ fill water-resistant down insulation equip the bag for backcountry adventure.
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Compact and weighing just over 2 pounds, the Marmot Helium 15 Degree sleeping bag is an ideal choice for high-performance 3-season backpacking. An array of features and 800+ fill water-resistant down insulation equip the bag for backcountry adventure.

The Helium 15 Degree is insulated with certified 800+ fill goose down. Fill power measures the loft or "fluffiness" of down insulation and Marmot goes to great lengths to guarantee the 800+ certification with a battery of in-house and external verifications. Renowned for their efficiency in retaining heat and compressible properties, the feathers and fibers of down have an incredibly soft, comfortable feel and, despite advances in synthetic materials, continue to provide the best warmth-to-weight ratio of any insulation available. The one weakness of down insulation is that it loses much of its ability to maintain warmth when it gets wet; this is less of a problem in the Helium 15 Degree, though, since the down in this bag is protected with Marmot’s Down Defender water repellent treatment that allows the down to stay drier 10 times longer than untreated down in damp conditions. Down Defender down also maintains significantly more loft and dries faster than untreated down.

Despite its lightweight construction, the Helium 15 Degree makes no sacrifice with regards to performance and features. Eliminating cold spots and providing comfort, sewn-through baffles ensure that the insulation is distributed evenly throughout the bag. The contoured, ergonomic hood helps reduce heat loss and keeps your head warm and comfortable. An insulated draft tube sewn behind the full-length zipper keeps cold air from reaching the inside of the sleeping bag and zipper guards help to avoid irritating and damaging snags. A “fold down” second zipper enables you to vent the bag when needed and also makes it easier to get in and out of the bag. An anatomically-designed footbox provides a more natural fit and improves warmth and comfort.

Filled and finished in the USA (Rohnert Park, CA), the Marmot Helium 15 Degree sleeping bag is available in Regular (fits up to 6' 0") and Long (fits up to 6' 6") lengths. A stuff sack and storage sack are included.

  • Filled and finished in the USA
  • Certified 800+ fill power goose down with Down Defender treatment
  • Fold-Down second zipper provides added ventilation and easy access
  • Anatomically designed footbox with wrap-around construction
  • Full length locking YKK two-way zipper with zip guard
  • Smooth-Curved baffle construction reduces down shifting
  • Stuff and Storage Sack Included



Best Use Backpacking, Camping
Insulation Type Down
Item Weight Regular: 2 lbs 1 oz
Long: 2 lbs 4.5 oz
Other Stuff Sack and Storage Sack Included
Warranty Limited Lifetime
Packed Size Regular: 7" x 14"
Long: 7" x 14"
Shell Material Pertex 20D 100% Nylon Ripstop DWR 1.03 oz/yd
Liner Material 30D 100% Nylon DWR 1.09 oz/yd
Fits to Length Regular: 6' 0"
Long: 6' 6"
Fits to Girth Regular: 61"
Long: 63"
Fill Material 800+ Fill Power Goose Down
Temperature Rating 15 Degrees F


Real Customer Reviews

Average Rating:
(based on 6 real customer reviews)

6 Items

Great bag
Reviewed by Anna - January 22, 2019

Likes: This is a warm, nice quality, very light packable bag. Proportions (length, foot box) run in favor of the tall person compared to other brands. We ended up keeping the Marmot Sawtooth 15, preferring its slightly roomier dimensions and lower price point to the weight/packability gains on this 800 fill down.

Dislikes: none

Excellent Spacious Bag
Reviewed by Ernesto A. - November 18, 2017

Likes: Very warm and comfortable. Compacts down nicely into a small bag provided. It is one of the roomiest mummy bags I've slept in and as a side sleeper that is important to me. Even with the extra room, I had no cold spots in my bag. The zipper works great and does not snag!

Dislikes: There is no baffle tube near your neck so cold air can get in but I did not have an issue with that. I used it in temperatures as low as 30 and it kept me warm.

Marmot Quality
Reviewed by Ciara U. - July 8, 2017

Likes: Always warm, well constructed, built to last.

Dislikes: None

kept me warm
Reviewed by Theresa B. - May 31, 2017

Likes: kept me warm and cozy

Dislikes: slips easily off my sleeping pad. The foot box is too narrow, makes me feel locked in. cant move around much...

Awesome bag!
Reviewed by Valentin P. - March 2, 2017

Likes: I think this is the best bag for weight/temperature rating.
The outer blue material is really nice to the touch.
Spacious; I'm 5'9", 170 athletic lbs and this bag (regular size) fits me really nice.

Dislikes: None

Great bag
Reviewed by Margarita D. - February 25, 2017

Likes: Light, warm, comfy.

Dislikes: Hard to fit in to the bag provided

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