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Big Agnes Sidewinder SL 20F Sleeping Bag - Men's

Sidewinder SL 20F Sleeping Bag - Men's

Regular price $249.95 USD
Regular price $249.95 USD Sale price $249.95 USD
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Side sleepers rejoice, it's your time to shine!

Specifically designed for those who sleep on their sides, the patent pending Sidewinder SL 20°F sleeping bag is 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.

For example, a jacket style hood keeps insulation close to the body without sacrificing mobility, while a unique "pillow barn" is accessed from either side you're rolling onto. A technical pattern rolls with you as you adjust through the night, while additional Fireline ECO inuslation added in the hip and feet alleviates common pressure points for side sleepers. Time to get real comfortable, you side sleeping unicorns!


  • 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
  • Keeps 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
  • 650 DownTek 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
  • Additionl "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
  • Nylon ripstop shell featuring a PFC-free water repellent finish
  • Polyester taffeta lining featuring a PFC-free water repellent finish
  • 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


 Shape  Mummy
 Temp Rating  20°F / -6°C
 Fill  650 fill DownTek with additional ECO synthetic insulation
 Fill Weight

 Reg: 19 oz / 538 g

 Long: 21 oz / 604 g

 Bag Size

 Reg: Up to 6' / 183 cm

 Long: Up to 6'6" / 198 cm

 Dimensions (shoulder/waist/foot)

 Reg: 61" / 55" / 36" (155cm / 140cm / 91cm)

 Long: 65" / 59" / 40" (165cm / 150cm / 102cm)

 Stuff Sack Size

 Reg and Long: 8" x 17.5" / 20 cm x 45 cm


 Reg: 2 lb 4 oz / 1.02 kg

 Long: 2 lb 8 oz / 1.13 kg



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