What does the dual temperature rating mean?

The first number is the limit rating, which represents the lower threshold typically used by men. The second number is the comfort rating, which is the benchmark for women. These follow industry standards for sleeping bag performance, and you should choose based on the coldest conditions you expect to encounter.

How does the recycling program work?

When the bag can no longer be repaired or resold, you send it back to the manufacturer. Because the entire bag is made from a single type of polymer, every component can be broken down and reprocessed into new materials instead of ending up in a landfill.

Does synthetic insulation stay warm when wet?

Yes. Synthetic insulation retains much of its loft and warmth even when damp, unlike down which clumps and loses insulating ability. This makes synthetic bags a better choice for humid or wet camping conditions.

How do I choose the right length?

Match the length to your height. A bag that's too long adds unnecessary weight and volume, while one that's too short won't seal properly at the top or give your feet enough room. Most manufacturers provide height ranges for each length option.

Soul™ Endless Promise® Synthetic Mummy Sleeping Bag

Recycled materials
insulated

The 3-second version

Built from a single material for complete recycling at end of life
Internal draft guard wraps around neck to seal out cold air
Dual-zippered side vent releases heat without direct exposure
Mummy taper limits movement inside
Requires return shipping for recycling
Synthetic insulation packs larger than down

Why it's on GiftsFeed

Tapered Mummy Bag With Full Recycling at End of Life

Most sleeping bags end up in landfills because they mix materials that can't be separated for recycling. A bag with nylon shell, polyester lining, plastic zippers, and metal hardware becomes waste the moment a seam fails or the insulation compresses beyond repair. This one uses a single polymer throughout, which means the manufacturer can take it back, break it down, and turn it into new products instead of adding to a dump.

The tradeoff is committing to send it back when you're done, but the mono-polymer build doesn't compromise warmth or durability in the meantime. If you're tired of buying gear that has no plan beyond the purchase, this gives you a way out.

Good gift when

Backpackers who want warmth without the weight of excess fabric
Anyone who prioritizes gear that can be fully recycled
Campers who sleep in conditions where down gets too wet
People who run hot at night and need ventilation options

Skip it if You prefer a roomier bag with space to roll over or sleep on your side without feeling the taper

Specs

Insulation: Zerofiber 800 recycled synthetic
Construction: Mono-polymer for full recyclability
Draft protection: Headwall internal draft guard with insulated collar
Ventilation: Thermo Gill vent with internal and external zippers, zippered footbox
Shape: Tapered mummy
Lengths available: Short, Regular, Long
Temperature ratings: 15/25℉ or 30/40℉ (Limit/Comfort)
Recycling program: Return to manufacturer for full recycling

What's included

Sleeping bag with asymmetrical front zip
Headwall internal draft guard
Thermo Gill vent with dual zippers
Zippered footbox opening

If you're giving it

You'll need their size

Recipient needs to choose length and temperature rating for their height and camping conditions.

The details

This mummy-style sleeping bag strips away extra fabric to reduce pack weight while keeping the features that matter for warmth and comfort. The tapered silhouette follows a traditional design that minimizes bulk without sacrificing room to shift position, and an internal draft guard wraps around your neck to seal out cold air along the top opening. A plush collar overlaps itself at the front, creating a continuous barrier that blocks drafts while staying comfortable against your skin.

Temperature control comes from a dual-zippered vent on the side opposite the main closure. You can crack it incrementally to release body heat without exposing yourself directly to outside air, extending the range of conditions where the bag stays comfortable. A second zipper at the footbox lets you poke your feet out or add quick ventilation when you need it. Vertical and horizontal baffles hold the recycled synthetic insulation in place to prevent cold spots and keep warmth distributed evenly.

The entire bag is manufactured from a single polymer, which means every component can be broken down and reprocessed when the bag reaches the end of its usable life. Instead of heading to a landfill, you send it back to the manufacturer for full recycling. The synthetic insulation is made from aerospace-grade recycled material, offering warmth that performs even in damp conditions where down would lose loft.

Temperature ratings follow industry standards: the first number represents the limit rating (the lower threshold for men), and the second number represents the comfort rating (the benchmark for women). You choose between two temperature series and three lengths to match your typical conditions and body size.

NEMO Equipment

Soul™ Endless Promise® Synthetic Mummy Sleeping Bag

Streamlined synthetic sleeping bag built from a single material so it can be sent back for complete recycling

$299.95at nemoequipment.com

Choose an option

Quantity

Buy from NEMO Equipment

Ships and sold by NEMO Equipment. About this merchant

The 3-second version

Built from a single material for complete recycling at end of life
Internal draft guard wraps around neck to seal out cold air
Dual-zippered side vent releases heat without direct exposure
Mummy taper limits movement inside
Requires return shipping for recycling
Synthetic insulation packs larger than down

Cheaper alternatives

Questions

What does the dual temperature rating mean?: The first number is the limit rating, which represents the lower threshold typically used by men. The second number is the comfort rating, which is the benchmark for women. These follow industry standards for sleeping bag performance, and you should choose based on the coldest conditions you expect to encounter.
How does the recycling program work?: When the bag can no longer be repaired or resold, you send it back to the manufacturer. Because the entire bag is made from a single type of polymer, every component can be broken down and reprocessed into new materials instead of ending up in a landfill.
Does synthetic insulation stay warm when wet?: Yes. Synthetic insulation retains much of its loft and warmth even when damp, unlike down which clumps and loses insulating ability. This makes synthetic bags a better choice for humid or wet camping conditions.
What is the Thermo Gill vent?: It's a zippered opening on the side opposite the main zipper with both internal and external pulls. You can open it incrementally to release body heat without exposing yourself directly to cold outside air, which extends the temperature range where the bag stays comfortable.
How do I choose the right length?: Match the length to your height. A bag that's too long adds unnecessary weight and volume, while one that's too short won't seal properly at the top or give your feet enough room. Most manufacturers provide height ranges for each length option.