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Big Agnes Sidewinder SL 35 Sleeping Bag

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Big Agnes Sidewinder SL 35 Sleeping Bag

sku# 188571
Big Agnes - Sidewinder SL 35 Sleeping Bag
Model Info


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Product Info

The Big Agnes Sidewinder SL 35 Sleeping Bag is a fast and light backpacking bag for side sleepers. Weighing in at just about two pounds with a highly compressible design, this bag is built for the trail. The side facing hood and ambidextrous zipper allow for maximum comfort and ease of use on either side, or even switching sides throughout the night.

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 WeightRegular: 2lb / 907g | Long: 2lb 4oz / 1.02kg

Fill WeightRegular: 14.5oz / 411g | Long: 17oz / 477g

Compressed Bag SizeRegular: 6" x 7" / 15 x 18cm | Long: 6.5" x 8" / 16 x 20cm

Stuff Sack SizeRegular: 7.5" x 15" / 19 x 38cm | Long: 7.5" x 15" / 19 x 38cm

Shoulder GirthRegular: 61" / 155cm | Long: 65" / 165cm

Hip GirthRegular: 55" / 140cm | Long: 59" / 150cm

Foot GirthRegular: 36" / 91cm | Long: 40" / 102cm


Specifically Designed for People Who Sleep on Their Sides

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

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

Optimized Warmth and Minimized Pressure Points with Body Mapped Insulation

Easily Adjust Hood without Unzipping Using Low-profile Internal Cordlock Access

Seal out Drafts by Cinching Insulated Tube along Upper Hood Opening

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: 35
  • Shape: Mummy
  • Stuff Sack Size: 7.5 x 15"
  • Warranty: Limited Lifetime
Size Long Regular
Length Long Regular
Zipper Location Left Side, Right Side Left Side, Right Side
Max User Height 6'6" 6'
Weight (lbs) 2.25 2
Weight (g) 1020 907

Other Notes

Big Agnes products can only be shipped within the United States



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