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Big Agnes Sidewinder SL Sleeping Bag: 35F Down


Why We Like The Sidewinder SL Sleeping Bag

We like the Sidewinder SL Sleeping Bag for one simple reason, it is built specifically for sleeping on your side. Side sleepers have long battled slippery sleeping pads and bags not designed for us, so it is comforting to crawl into our bag and fall right asleep on our side. The key is the added Fireline synthetic insulation on our hip and feet that limits pressure.

  • Sleeping bag built for side sleepers who love to adventure
  • Durable nylon ripstop construction handles daily wear and tear
  • Mummy style locks in heat for chillier nights, packs down small
  • DownTek insulation offers lofty and lightweight warmth
  • Draft tube fights off light breezes throughout the night
  • Full-length zipper makes it easy to get in and out in a hurry
  • Item #BAGZ2AB

nylon ripstop
650-fill DownTek, FireLine Eco
Max User Height
[regular] 6ft, [long] 6ft 6in
Shoulder Circumference
[regular] 61in, [long] 65in
Hip Circumference
[regular] 55in, [long] 59in
Foot Circumference
[regular] 36in, [long] 40in
Draft Tube
Fill Weight
[regular] 14.5oz, [long] 1lb 1oz
Storage Sack
Stuff Sack
Stuff Size
7.5 x 15in
Claimed Weight
[regular] 2lb, [long] 2lb 4oz
Recommended Use
weekend camping
Manufacturer Warranty

Tech Specs

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Sidewinder SL Sleeping Bags

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.