Big Agnes Sidewinder SL 20 Sleeping Bag

Specifically designed for those who sleep on their sides, the patent pending Sidewinder Series was engineered to ensure warmth, comfort, and ease of use no matter which side you’re on. Constructed with features you expect from a traditional mummy bag with additional body mapped insulation to optimize warmth where you need it and minimize pressure points and other ‘side effects’. The Sidewinder SL 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.

Specs + Sizing

Bag Weight
Regular: 2lb 4oz / 1.02kgg / Long: 2lb 8oz / 1.13kg

Fill Weight
Regular: 19oz / 538g / Long: 21oz / 604g

Compressed Bag Size
Regular: 6.5" x 8" / 16 x 20cm / Long: 7.5" x 8" / 19 x 20cm

Stuff Sack Size
Regular: 8" x 17.5" / 20 x 45cm / Long: 8" x 17.5" / 20 x 45cm

Features
Specifically designed for people who sleep on their sides with a technical fit, patterned to move with you as you roll from one side to the other

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

Optimized warmth and minimized pressure points with body mapped insulation

Improved shell fabric and lining with PFC-free water repellent finish

Down fill with a PFC-free water repellent finish throughout the bag provides lofty warmth while synthetic insulation helps alleviate common pressure points in the hips and feet

Optimized fit and thermally efficient footbox is patterned to mimic the shape of your foot position while lying on your side

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

Hang dry or store bags with exterior loops

Storage sack & stuff sack included

Construction + Materials
Shell: nylon ripstop featuring a PFC-free water repellent finish

Lining: polyester taffeta featuring a PFC-free water repellent finish

Primary Fill: 650 fill DownTek™ repels water while maintaining insulating value - bluesign® Certified PFC free 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

Regular: fits up to 6' / 183cm

Long: fits up to 6'6" / 198cm

Works with any pad size or style