Big Agnes Sidewinder SL
Best sleeping bag for side sleepers seeking comfort and warmth.
Engineered for those who toss and turn, this bag features a unique shape that moves with you rather than restricting you. It balances warmth and weight by mapping synthetic insulation in high-pressure areas while keeping premium down where it counts most.
$199.96
at
BAP! / WearBAP
More Sidewinder options
Who it's for
- Side sleepers seeking ergonomic comfort and freedom of movement
- Backpackers prioritizing low weight and compact gear
- Hikers camping in humid or unpredictable weather conditions
Who should skip it
- Back or stomach sleepers who prefer a traditional bag shape
- Budget-conscious campers looking for an entry-level sleeping bag
- Campers wanting low-maintenance, wash-and-go gear
Performance breakdown
Side-sleeping ergonomics
The specialized footbox and fit perfectly accommodate natural side-sleeping positions.
Thermal efficiency
Body-mapped insulation zones effectively trap heat exactly where you need it.
Pillow stability
The integrated Pillow Barn keeps your head support secure all night.
Zipper performance
Anti-snag locking mechanism ensures smooth entry and exit in the dark.
Moisture resistance
Water-repellent down and PFC-free finish handle damp conditions with ease.
Mobility and fit
Technical cut allows natural movement without feeling restricted or claustrophobic.
Key Specs
Temperature Rating
20 degrees Fahrenheit
Weight
2.25 lbs
Fill Power
650 cubic inches per ounce
Sleeping Bag Shape
Mummy
Insulation Type
650-fill DownTek and FireLine ECO Synthetic
Shell Material
Nylon ripstop
Lining Material
Polyester taffeta
Max User Height
72 inches
Zipper Location
Ambidextrous
Water Resistant
Yes
What Reviewers Say
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