Traditional mummy bag optimized for side sleepers. Specifically designed for the over 60% of people who sleep on their sides, the second generation of the patented Sidewinder side sleeper technology ensures warmth, comfort, and ease of use in any position you settle into. Constructed for comfort, with additional body mapped insulation to optimize warmth where you need it and provide cushioning and support at the hips and shoulders, easing pressure points and other ‘side effects’. The Sidewinder is a side sleeper’s dream bag with technical features that roll seamlessly from one adventure to the next, and from one side to the other at night. Optimized profile and thermally efficient footbox is patterned to mimic body position while lying on your side.

Down fill with a water-repellent finish throughout the bag provides lofty warmth
Strategically placed synthetic insulation to provide padding and pressure relief at the knees, hips, and shoulders
Close fitting, jacket-style hood keeps insulation close to the body without sacrificing mobility
Keep pillow in place with unique Pillow Barn made of stretch mesh material with interior access from either side for easy adjustment
Smooth, quick zip with anti-snag locking zipper with no-draft Zipper garage, and long, ambidextrous zipper
Easily adjust hood without unzipping using low-profile internal cordlock access
Seal out drafts by cinching insulated tube along upper hood opening
Storage sack & stuff sack included
Total Weight: 2 lb 7 oz
ISO Comfort: 30°F
ISO Limit: 19°F
Total Fill Weight: 15oz Down + 6.5oz Synthetic
Compressed Bag Size: 10" x 8"
Stuff Sack Size: 14L 8" x 17.5"
Max User Height: 6'
Recommended Pad Size: Works with any pad size or style
Shoulder Girth: 61"
Hip Girth: 55"
Foot Girth: 36"
Shell: Recycled polyester ripstop featuring a water-repellent finish without intentionally added PFAS chemicals
Lining: Recycled polyester taffeta featuring a water-repellent finish without intentionally added PFAS
Primary Fill: 650 fill Downtek™ PFC-Free repels water while maintaining insulating value, with bluesign® Certified water-repellent chemistry
Body Mapped Fill: FireLine™ ECO Synthetic Insulation, 100% post-consumer recycled polyester, featuring low-denier fibers that are tightly woven and provide high loft, compressibility, high weight-to-warmth ratio, and durability
Machine wash in a washing machine WITHOUT AN AGITATOR, agitators are likely to cause damage to your gear
U.S. Patent 11957260 B2