Big Agnes Sidewinder SL Sleeping Bag
Best sleeping bag for women who prefer resting on their sides.
Finally, a sleeping bag that understands you don't sleep like a mummy. By mapping insulation to your hips and feet while adding a dedicated pillow pocket, this bag eliminates the usual cold spots and shifting gear. It’s a specialized piece of kit that prioritizes side-sleeping comfort over universal versatility.
$249.95
at
BAP! / WearBAP
Who it's for
- Side sleepers who shift positions frequently throughout the night
- Women seeking optimized warmth and a tailored, ergonomic fit
- Restless sleepers prone to sliding off their sleeping pads
Who should skip it
- Ultralight backpackers prioritizing minimal pack weight and size
- Campers who prefer not to invest in high-R-value pads
- People who prefer traditional side-zipper entry systems
Performance breakdown
Side-Sleeping Ergonomics
The contoured footbox and technical fit perfectly accommodate natural side-sleeping positions.
Thermal Efficiency
Body-mapped insulation prevents cold spots where you need warmth the most.
Pillow Stability
The integrated pillow barn keeps your head support secure all night.
Mobility and Comfort
Jacket-style hood design allows for movement without sacrificing essential heat retention.
Zipper Reliability
Anti-snag locking mechanism ensures smooth entry and exit in the dark.
Packability
High-loft down and synthetic blend compresses well for backcountry trekking.
Key Specs
Shape
Mummy
Temp Rating
20°F / -6°C
Fill
650 fill DownTek with additional ECO synthetic insulation
Fill Weight
Petite: 22 oz / 634 g, Reg: 24.5 oz / 700 g
Bag Size
Petite: Up to 5'5" / 165 cm, Reg: Up to 5'10" / 178 cm
Dimensions (shoulder/waist/foot)
Petite: 56" / 54" / 31" (142cm / 137cm / 79cm), Reg: 58" / 56" / 33" (147cm / 142cm / 84cm)
Stuff Sack Size
Petite and Reg: 8" x 17.5" / 20 cm x 45 cm
Weight
Petite: 2 lb 7 oz / 1.11 kg, Reg: 2 lb 10 oz / 1.19 kg
Still have a question?
Ask Metto anything about the Big Agnes Sidewinder SL Sleeping Bag before you decide.
