Mountain Equipment Company

Big Agnes Sidewinder SL -7C Down Sleeping Bag - Unisex


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A cozy mummy style bag for the side sleepers among us. The Sidewinder's innovative cocoon pattern offers a great night’s sleep. The SL version uses a body-mapped blend of down and synthetic insulation to add extra coziness. Synthetic insulation at the hips and foot box reduces common cold spots for side sleepers. The blanket-like hood has hand pockets in the corners, so you can tuck yourself in just like you do at home.

  • Shell is nylon, lining is soft polyester microfiber, both have a water-repellent finish
  • 650 fill-power DownTek™ uses Bluesign™ approved chemistry for water-repellency, has antimicrobial and antibacterial protection
  • Sourced under the Responsible Down Standard
  • FireLine™ Eco insulation uses 100% post-consumer recycled polyester. Durable, low denier fibres are tightly woven to provide high-loft, compressibility, a high weight-to-warmth ratio
  • Cocoon design holds insulation close to the body
  • Horizontal baffles create tunnels of warmth around your body and prevent insulation from shifting and creating cold spots
  • Anti-snag locking zipper operates ambidextrously
  • Draft flap behind zip ensures cold air doesn't sneak in
  • Optimized footbox mimics the natural position of your feet when lying on your side
  • Hood lets you lift and move your head, even when fully zipped up and has a one-handed cinch adjustment
  • Stretch-mesh pillow pocket keeps your pillow right where you want it
  • Hang loops let you air it out in the sun
  • Includes a mesh storage bag and a nylon stuff sack

Tech specs

Weight1.13kg (Long Left Zip)
1.02kg (Regular Left Zip)
Ideal for
  • Backpacking
  • 650 fill-power water-repellent goose down
  • Synthetic
604g (Long Left Zip)
538g (Regular Left Zip)
  • DownTek
  • FireLine
  • Offset quilt
Face fabric
  • Nylon ripstop
  • Polyester
Packed size19x20cm (Long Left Zip)
16 x 20cm (Regular Left Zip)
Shoulder girth165cm (Long Left Zip)
155cm (Regular Left Zip)
Hip girth150cm (Long Left Zip)
140cm (Regular Left Zip)
Foot girth102cm (Long Left Zip)
91cm (Regular Left Zip)
Additional feature(s)
  • Draft tube behind zipper
  • Interior pocket(s)
  • Stuff sack included
  • Pillow pocket
  • DWR-treated shell fabric
Product sustainability
  • Certified Responsible Down
  • Bluesign® Approved Material
  • Recycled content
Made inChina

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