Big Agnes Sidewinder
Best specialized sleeping bag for dedicated side sleepers seeking nighttime mobility.
Designed specifically for those who prefer sleeping on their sides, this bag features a unique, body-mapped insulation layout that provides pressure relief at the knees, hips, and shoulders. It balances the loft of down with the durability of synthetic fill, ensuring warmth and comfort while maintaining a compact, packable profile.
$179.95
More Sidewinder options
Who it's for
- Side sleepers seeking a bag tailored to their natural posture
- Restless sleepers who struggle with shifting pillows during the night
- Eco-conscious backpackers prioritizing sustainable outdoor gear
Who should skip it
- Active sleepers who require significant leg room and mobility
- Ounce-counting thru-hikers focused on minimizing their total pack weight
- Winter campers facing temperatures consistently below freezing
Performance breakdown
Side-sleeping ergonomics
The specialized fit eliminates the binding common in traditional mummy bags.
Thermal efficiency
Hybrid insulation balances loft and heat retention for cold-weather comfort.
Packability
Compresses down to eight liters, making it manageable for multi-day treks.
Ease of entry
Front-zip design and anti-snag technology make getting in and out effortless.
Weight-to-warmth ratio
Solid performance, though slightly heavier than ultralight down-only alternatives.
Feature integration
The pillow sleeve and jacket-style hood significantly improve overnight sleep quality.
Key Specs
Temperature Rating
20 degrees Fahrenheit
Insulation Type
Down and Synthetic Blend
Fill Power
650
Weight
2.44 lbs
Shell Material
Recycled ripstop polyester
Lining Material
Recycled polyester taffeta
Zipper Location
Front
Water Resistant
Yes
Compressed Volume
8 liters
Max User Height
78 inches
Know before you buy
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