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Big Agnes Sidewinder Camp 20deg Sleeping Bag
Our editorial team reviews specifications, product data, and field-use information to keep pages accurate.
$189.95
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SKU: WX2*0741505
Overview
Built for side sleepers who want a more natural sleeping position in camp, this sleeping bag uses a cocoon-style fit that keeps insulation close and helps reduce cold spots. It is comfort rated to 20°F and combines an integrated hood, draft collar, hand pouches, and a thermally efficient footbox to create a more enclosed sleep system. The pillow stays positioned inside the wrap, and the long, ambidextrous zipper with anti-snag details is designed for easier entry and exit. Included storage and stuff sacks add practical value for backpacking or base camp use, though the focused fit is aimed more at comfort for side sleeping than at a roomier traditional mummy bag.
Why Hunters Choose the Big Agnes
Side Sleepers
A traditional mummy bag shape
Comfort Rated
Down to 20°F for cooler
Integrated Hood
Helps keep the pillow in
Relaxed Cocoon-style
Fit keeps insulation close to
Includes Draft
Collar, hand pouches, and a
Key Features
- Designed specifically for side sleepers in a traditional mummy bag shape.
- Comfort rated down to 20°F for cold-weather camping.
- FireLine Eco fill helps keep insulation close to the body.
- Integrated hood keeps the pillow in place through the night.
- PFAS-free water-repellent shell fabric and lining.
- Includes storage sack and stuff sack for packing and storage.
Best Used For
- Side sleepers who want a mummy bag shaped for a more natural side-sleeping position
- Campers seeking a 20°F comfort-rated bag for cooler overnight temperatures
- Users who want a sleeping bag with an integrated hood and draft-reducing features
- Hunters and backpackers looking for included storage and stuff sacks for camp organization
Specifications
| Comfort Rating | 20degF |
|---|---|
| Designed For | Side sleepers |
| Draft Collar | Yes |
| Exterior Loops | Yes |
| Fit | Plush, relaxed cocoon-style fit |
| Footbox | Optimized fit and thermally efficient footbox |
| Hand Pouches | Yes |
| Hood Adjustment | Low-profile internal cordlock access |
| Included Accessories | Storage sack and stuff sack |
| Insulated Hood Opening | Insulated tube along upper hood opening |
| Insulation | FireLine(TM) Eco fill |
| Integrated Hood | Yes |
| Pillow Retention | Pillow stays in place, tucked inside of the wrap |
| Shell Fabric Finish | PFAS-free water-repellent finish |
| Sleeping Bag Type | Mummy bag |
| Zipper Garage | No-draft zipper garage |
| Zipper Orientation | Long, ambidextrous zipper |
| Zipper Type | Anti-snag locking zipper |
Pros
- Designed specifically for side sleepers with a traditional mummy bag shape
- Comfort rated down to 20°F for cooler overnight conditions
- Integrated hood helps keep the pillow in place through the night
- Relaxed cocoon-style fit keeps insulation close to the body
- Includes draft collar, hand pouches, and a thermally efficient footbox
- Storage sack and stuff sack are included for packing and storage
Considerations & Trade-offs
- Comfort is rated to 20°F, so it is intended for cool-weather use rather than colder conditions.
- The side-sleeper-focused cocoon fit and integrated hood are specialized features, which may feel less familiar if you prefer a traditional mummy bag shape.
- The bag includes a long, ambidextrous zipper and draft-control features, but those details can add a bit of complexity compared with a simpler sleeping bag design.
- FireLine Eco fill and the PFAS-free water-repellent finish are useful materials choices, but they do not replace the need for a shelter or careful moisture management in wet conditions.
Suggested Comparisons
- Sleeping bags for side sleepers
- Mummy sleeping bags
- Cold-weather sleeping bags
- Backpacking quilts
Suggested Accessories
- Sleeping bag stuff sack
- Sleeping bag storage sack
- Sleeping pad
- Camping pillow
Frequently Asked Questions
Is the Sidewinder Camp 20deg Sleeping Bag designed for side sleepers only?
It is specifically designed for side sleepers, with a cocoon-style fit and a shape intended to work with side-sleeping body position. The product description does not say it is limited to side sleepers only.
What temperature is this sleeping bag rated for?
The bag is comfort rated down to 20°F.
Does it include a pillow pocket or hood feature to keep a pillow in place?
Yes. The description says the pillow stays in place inside the integrated hood, and that the bag has an integrated hood with a 360° wrap.
What insulation does this sleeping bag use?
It uses FireLine(TM) Eco fill.
What storage or packing accessories come with the bag?
A storage sack and stuff sack are included.