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Big Agnes Sidewinder SL 20 Sleeping Bag - Women's

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Big Agnes Sidewinder SL 20 Sleeping Bag - Women's

sku# 188572
Big Agnes - Sidewinder SL 20 Sleeping Bag - Women's
Model Info
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Product Info

Built for the side sleepers of the backcountry, the Big Agnes Sidewinder SL 20 Sleeping Bag is one of those things that you see and wonder why it hasn't been around forever. This lightweight, highly packable bag uses strategic mapping of down and synthetic insulations to eliminate pressure points and provide versatile warmth for your overnight adventures. It provides a snug and secure fit that moves with you as you roll from one side to the other.

Product Details


Shell FabricNylon Rip-stop Fabric with a Durable Water Repellent (DWR) Finish

Lining Polyester Taffeta with a Durable Water Repellent (DWR) Finish


650 fill DownTek™ Primary FillWater repellent down that uses a PFC-Free, bluesign™ approved chemistry.

FireLine™ ECO Synthetic Body Mapped Fill100% post-consumer recycled polyester. Features low-denier fibers that are tightly woven and provide high loft, compressibility, high weight-to-warmth ratio and durability.


Bag WeightPetite: 2lb 7oz / 1.11kg | Regular: 2lb 10oz / 1.19kg

Fill WeightPetite: 22oz / 634g | Regular: 24.5oz / 700g

Compressed Bag SizePetite: 7" x 8" / 18 x 20cm | Regular: 6" x 7.5" / 19 x 20cm

Stuff Sack SizePetite: 8" x 17.5" / 20 x 45cm | Regular: 8" x 17.5" / 20 x 45cm

Shoulder GirthPetite: 56" / 142cm | Regular: 58" / 147cm

Hip GirthPetite: 54" / 137cm | Regular: 56" / 142cm

Foot GirthPetite: 31" / 79cm | Regular: 33" / 84cm


Women's Specific FitDesigned to contour to your figure for the most thermally efficient and comfortable night's sleep.

Specifically Designed for People Who Sleep on Their Sides

Optimized Fit and Thermally Efficient Footbox 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

Optimized Warmth and Minimized Pressure Points with Body Mapped Insulation

Seal out Drafts by Cinching Insulated Tube along Upper Hood Opening

Patterned to Move with You as You Roll from One Side to the Other

Jacket-style Hood Opening Contours to the Shape of Your Face

Pillow Barn Keeps Your Pillow Tucked in Tight

Hang Dry or Store Bags with Exterior Loops

Storage Sack & Stuff Sack Included


  • Insulation: Down, Synthetic
  • Temperature Rating: 20
  • Shape: Mummy
  • Stuff Sack Size: 8 x 17.5"
  • Warranty: Limited Lifetime
Size Petite Regular
Length Short Regular
Zipper Location Left Side, Right Side Left Side, Right Side
Max User Height 5'5" 5'10"
Weight (lbs) 2.44 2.625
Weight (g) 1100 1190

Other Notes

Big Agnes products can only be shipped within the United States



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