Experience side-sleeping comfort under the stars like never before. The Big Agnes Sidewinder SL Sleeping Bag is expertly engineered for those who toss and turn, designed with a unique shape and advanced materials that cater specifically to side sleepers. Whether you’re backpacking through the Rockies or enjoying a weekend in the woods, this lightweight, packable sleeping bag delivers warmth, freedom, and ergonomic support all night long.

Key Features:

Side-Sleeper Ergonomic Design
Shaped to support the natural curled posture of side sleepers, offering optimal comfort and movement without constriction.
Superlight Insulation with Recycled Materials
650-fill DownTek™ water-repellent down and FireLine™ ECO synthetic insulation strategically placed for maximum warmth-to-weight performance.
Body-Mapped Baffle Construction
Reduces cold spots and maximizes thermal efficiency while allowing the bag to flex and conform to your movements.
Sustainable & Eco-Conscious
Built with PFC-free water-repellent materials and bluesign®-approved fabrics for reduced environmental impact.
Ultralight & Packable
Ideal for thru-hikers and minimalist campers—compresses small without sacrificing performance.
Smooth Entry System
Zipperless footbox and pillow barn keep your gear in place and eliminate tangles.