Eider EX -10 Sleeping Bag

Eider EX -10 Sleeping Bag

Regular price Sale price$829.00
11 Reviews


Due to high demand, Feathered Friends sleeping bags may take 5 to 9 days to complete and will not arrive by Dec 25. Please view our Shipping information here.

Once we receive your order, we will finish hand-crafting your sleeping bag right here in Seattle!

If you have an urgent deadline, do not hesitate to contact us.

Please check our Shipping Info page for current shipping times. Thanks!

The Eider is the roomier version of the Widgeon, which was originally designed for the successful American K2 expedition in 1990. The Eider is the go-to bag for cold weather activities from mountaineering to snow camping, or for those who plan to wear down layers while sleeping to push the comfort rating of the bag. The Eider is 2-4 inches larger in circumference than the Widgeon, and is the winter equivalent of the best-selling Swift. 

EX: Winter & Expedition. Pertex® Shield® fabric. 15 denier with 40 denier rip-stop reinforcement. Water-resistant/ breathable coating.


"The Feathered Friends Eider EX -10 bag hits just about every mark you could ask for in a cold weather bag."

Backwoods Pursuit, 2023

Backwoods Pursuit Logo Eider Sleeping Bag Review

See the in-depth, glowing review of the Eider EX -10 from Backwoods Pursuit! Read Review


  • Mummy shape (standard width) with #5 YKK two-way zipper with locking sliders
  • Pertex Shield EX water-resistant/breathable shell with DWR
  • Pertex 30 denier taffeta lining
  • Permanent collar with EX facing to prevent breath condensation from entering the bag
  • Continuous baffles let you position the down where you need it
  • 3D contoured hood wraps a layer of insulation around your head
  • Generous draft tube prevents cold air from seeping past the zipper
  • Tuck-stitch construction hides the baffle threads and prevents moisture from wicking through to the inside
  • Includes storage bag & stuff sack


Mummy Sleeping Bags

Feathered Friends wide mummy sleeping bags have more space throughout, especially in the shoulders. This is perfect for those with broader builds, or those preferring to stash a lot of gear inside the bag.

Regular Length
Fits up to 6' 0" | 183 cm

Long Length
Fits up to 6' 6" | 198 cm

Have questions on sizing? Feel free to Contact Us - We're happy to help!

Additional Info

Ideal Sleeper Height Reg 6' 0" / 183 cm 
Long 6' 6" / 198 cm
Dimensions 64" shoulder / 58" hip / 40" footbox
Zipper Left Side, YKK #5
Shell Pertex® Shield EX (waterproof, breathable)
Lining Pertex® 30 denier nylon taffeta
Fill Power 900+ Goose Down
Origin Made in Seattle, USA of imported materials
Temp Rating -10ºF / -23.3ºC
Fill Weight Reg 2 lb 0 oz / 908 g 
Long 2 lb 1.8 oz / 960 g
Average Weight Reg 3 lb 6.8 oz / 1553 g 
Long 3 lb 10.3 oz / 1653 g
Packed Size 23L


Customer Reviews
5.0 Based on 12 Reviews
5 ★
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United States United States


I have enough nights snow camping now at near or zero F temps in this eider ex to give a good impression. I’ve not gotten cold once. Usually start out too warm in fact. Sleeping only in heavy wool and a warm hat. I do tend to stuff my FF eos puffy in around my head area to help further seal heat. Snug as a bug in a rug. Only thing this bag lacks is side baffles. Does anyone really ever intentionally shift their down? Love the sleeping bag regardless.

  • Fit Runs SnugVery Roomy
  • Warmth Not WarmExtremely Warm
  • How would you rate the quality? Not greatExcellent
Feathered Friends Eider EX -10 Sleeping Bag Review
Canada Canada

Great sleeping bag

I tried out the sleeping bag at a temperature just below freezing. Roomy and warm. Lots of space at the foot to keep boot liners and other kit like socks warm over night. The sleeping bag was placed on top of a medium thickness sleeping pad and a closed cell foam pad to prevent contact with moisture from the ground.

  • How is the fit of the sleeping bag? Runs SnugVery Roomy
  • How is the warmth? Not WarmExtremely Warm
  • How would you rate the quality? Not greatExcellent
Craig C.

Eider ex-10

I needed a true winter bag for here in Colorado. I own several FF bags in various weights and materials. I've never been disappointed. When you're in the backcountry you depend on your gear, especially in the winter. Great job feathered friends. C

Philip R.

Great bag

Fantastic quality and great customer service during purchase process.

Joseph S.

Canadian winters

Great bag to sleep outside in Canadian winters. Stayed plenty warm tucked under a tarp. Love the zip and the hood holds my pillow in place while I roll around in the bag all night.