Engineered and ergonomically contoured to ensure warmth, comfort, and ease of use in any position.
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 / 907g / Long: 2lb 4oz / 1.02kg|
|Fill Weight||Regular: 14.5oz / 411g / Long: 17oz / 477g|
|Compressed Bag Size||Regular: 6" x 7" / 15 x 18cm / Long: 6.5" x 8" / 16 x 20cm|
|Stuff Sack Size||Regular: 7.5" x 15" / 19 x 38cm / Long: 7.5" x 15" / 19 x 38cm|
FeaturesSpecifically 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 + MaterialsShell: 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
Here’s what other people think.
What’s in a Name?
Here in the Western States, Rattlesnakes are common and dangerous. Sidewinders got their name for being sidewards-moving rattlesnakes, that only make contact with the sand in two small places on their body. This helps them move quicker and stay cooler by lifing their bodies off the hot sand. Side-sleepers, much like Sidewinders, make contact with the ground primarily in two places, the hips and shoulders. We developed the Sidewinder bags specifically to provide more comfort for side-sleepers, with strategically placed insulation to provide more comfort and warmth regardless of what position you wind up in.