Traditional Mummy Bag Optimized for Side Sleepers Specifically designed for the 60%+ of people who sleep on their sides, the second generation of patented Sidewinder technology delivers warmth, comfort, and ease of use in any position. Built with body-mapped insulation, it provides warmth where you need it most while adding cushioning at the hips and shoulders to reduce pressure points. The Sidewinder is a side sleeper’s dream—engineered to move with you as you roll from one side to the other, seamlessly adapting from one adventure to the next.U.S. Patent 11957260 B2 Features Second-generation side sleeper design with a technical fit that moves with you Optimized profile and thermally efficient footbox shaped for side sleeping position Down insulation with water-repellent finish for lofty warmth Strategically placed synthetic insulation for cushioning at knees, hips, and shoulders Close-fitting, jacket-style hood for warmth without restricting movement Pillow Barn system: Stretch mesh keeps pillow in place Interior access from either side for easy adjustment Smooth, anti-snag locking zipper with no-draft zipper garage Long, ambidextrous zipper for flexible use Low-profile internal cordlock for easy hood adjustment without unzipping Insulated tube along hood opening to seal out drafts Storage sack and stuff sack included Specs Total Weight: 2 lb 4 oz ISO Comfort: 30°F ISO Limit: 19°F Fill Weight: 14 oz Down + 6 oz Synthetic Compressed Size: 9.5" x 8" Stuff Sack Size: 14L | 8" x 17.5" Max User Height: 5'6" Recommended Pad: Works with any pad size or style Shoulder Girth: 58" Hip Girth: 52" Foot Girth: 33" Materials & Construction Shell: Recycled polyester ripstop with water-repellent finish (no intentionally added PFAS) Lining: Recycled polyester taffeta with water-repellent finish (no intentionally added PFAS) Primary Insulation: 650 fill DownTek™ (PFC-free, bluesign® certified water-repellent chemistry) Body-Mapped Insulation: FireLine™ ECO synthetic (100% post-consumer recycled polyester) Low-denier fibers for high loft, compressibility, durability, and warmth efficiency Down Sleeping Bag Care Storage Store uncompressed (hang if possible or use included mesh storage sack) Keep in a cool, dry place away from heat sources Cleaning Machine wash without an agitator Use oversized machines if needed (laundromat recommended for large bags) Wash on warm, gentle cycle Use down-specific soap (e.g., Nikwax Down Wash Direct) Rinse twice Tumble dry low with clean tennis balls Finish drying on high heat in 5-minute intervals to restore loft Allow cooling between intervals to prevent damage Do Not: Use fabric softeners Bleach Iron Dry clean Repairs & Warranty Guaranteed against manufacturing and material defects Not covered: Normal wear and tear Owner modifications Misuse or accidents Use outside intended purpose Repairs may be available at a reasonable cost Returned gear must be clean and free of debris
