Side view of the Thermotrail HeliumLite 15 sleeping bag showing its mummy shape and compact profile.
Close-up of the anti-snag zipper and anatomically designed footbox of the down sleeping bag.
The sleeping bag packed into its stuff sack alongside other backpacking gear, ready for a cold-weather trek.
Side view of the Thermotrail HeliumLite 15 sleeping bag showing its mummy shape and compact profile.
Close-up of the anti-snag zipper and anatomically designed footbox of the down sleeping bag.
The sleeping bag packed into its stuff sack alongside other backpacking gear, ready for a cold-weather trek.
Side view of the Thermotrail HeliumLite 15 sleeping bag showing its mummy shape and compact profile.
Close-up of the anti-snag zipper and anatomically designed footbox of the down sleeping bag.
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Marmot Mad River 15 mummy sleeping bag in a tent, demonstrating its lightweight and warm features. Marmot Mad River 15 Mummy Sleeping Bag $279.00 Original price was: $279.00.$111.60Current price is: $111.60.
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Thermotrail HeliumLite 15 Mummy Bag

Original price was: $429.00.Current price is: $171.60.

-60%

A lightweight sleeping bag for cold temperatures that’s built for serious outdoor treks and mountaineering missions.

(3 customer reviews)

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Side view of the Thermotrail HeliumLite 15 sleeping bag showing its mummy shape and compact profile.
Thermotrail HeliumLite 15 Mummy Bag
$429.00 Original price was: $429.00.$171.60Current price is: $171.60.

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Designed for alpine hikers and frosty-weather wanderers, the Thermotrail HeliumLite 15 strikes the perfect balance between comfort, weight, and warmth. This down sleeping bag boasts 800-fill ExpeDRY-treated goose down, ensuring moisture resistance and quick drying during extended trips.

  • Temperature rating: ISO tested to 15°F comfort, ideal for early spring to late fall.
  • Anatomical footbox and curved baffle design prevent heat loss and down shifting.
  • Dual zipper system offers smooth ventilation and easy entry.
  • Includes stuff sack and long-term storage sack for your backpacking gear.

Whether you’re chasing elevation or settling into a frozen forest, this is one of the top rated sleeping bags for mountaineering.

Additional information

colors: No selection

ARCTIC NAVY/DARK AZURE

sizes: No selection

Short, Regular, Long

3 reviews for Thermotrail HeliumLite 15 Mummy Bag

  1. Russell Jenkins (verified owner) –

    I’ve used this on two early spring hikes and it kept me perfectly warm both nights. Definitely worth it!

  2. William Hicks (verified owner) –

    Bought this as an affordable mummy sleeping bag for hiking the Rockies—super light, cozy, and compressible.

  3. Troy Carr (verified owner) –

    The zipper design and footbox shape are game changers. Easily the best sleeping bag for cold weather backpacking I’ve owned.

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FAQs

Is this the best sleeping bag for cold weather backpacking?
It’s engineered to meet the demands of cold-weather excursions, ISO tested at 15°F and equipped with premium goose down—making it an ideal choice for alpine adventures.
How to maintain a down sleeping bag?
Store uncompressed in the provided mesh sack, avoid frequent washes, and spot-clean with gentle soap. Use a sleeping bag liner to reduce cleaning frequency and preserve insulation.
Is it suitable for mountaineering expeditions?
Absolutely. Its lightweight build and high fill power make it one of the top rated sleeping bags for mountaineering, keeping you warm without weighing you down.
SKU: thermotrail-heliumlite-15-mummy-bag-49c7 Category: Tags: , , , , , , ,

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