Ptarmigan EX -25 Sleeping Bag
Ptarmigan EX -25 Sleeping Bag

Ptarmigan EX -25 Sleeping Bag

Regular price Sale price$879.00
19 reviews


Due to high demand, Feathered Friends sleeping bags may take 5 to 9 days to complete. 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!

Built for big mountain expeditions and frigid conditions, the Ptarmigan is one of the lightest and warmest bags around. We combined the finest materials and our time tested design to bring you a bag that can handle the rigors of mountaineering use and provide a warm respite at the end of a long day. 

We send more Ptarmigan sleeping bags to Denali than any other bag we make.

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


  • Mummy shape (average 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
  • Side-block baffles maintain a 60:40 top to bottom insulation distribution
  • 3D contoured hood wraps a layer of down around your head
  • Generous draft tube prevents cold air from seeping past the zipper
  • Large side walls ensure even insulation all around
  • Overlapping dual-webbing zip guard guides the fabric away from 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

The Feathered Friends Ptarmigan is built with our standard-width mummy shape - for most people, this will have enough space for a bit of extra gear without too much extra volume.

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 60" shoulder / 56" hip / 38" 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 -25ºF / -31.67ºC
Fill Weight Reg 2 lb 3.5 oz / 1006 g
Long 2 lb 5.5 oz / 1063 g
Average Weight Reg 3 lb 12.2 oz / 1708 g
Long 3 lb 15.6 oz / 1803 g
Packed Size 30L


Customer Reviews
5.0 Based on 21 Reviews
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United States United States

Great bag great service

Thanks Feathered friends for getting the sleeping bag out for the trip to Dos Ojos it gave me a lot more peace of mind to have it along

  • Fit Runs SnugVery Roomy
  • Warmth Not WarmExtremely Warm
  • How would you rate the quality? Not greatExcellent
Shaylin P.
United States United States


I would like to thank Feathered Friends for getting an order shipped out in time for the mountaineering trip to Dos Ojos. They said they could not get it done and then a bag showed up in time! So grateful because it made me feel better to be climbing with this bag than any other choices.

United States United States

Don’t Risk Sleeping Bag Envy

Unlike my tent mate, I stayed warm and snug for 3 weeks on Denali in my Ptarmigan sleeping bag. This is the gold standard for cold weather sleeping bags.

  • 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
United States United States

Crazy warm

Finally got a chance to test out the bag in some slightly cold (15F) weather. I am convinced, FF doesn’t make sleeping bags, they make ovens! I only wore a baselayer, and that was too much. Looking forward to using it on my trip to Aconcagua! Just make sure you pair it with a good sleeping pad, since that is the only spot that felt a little less warm (by no way a reflection of the bag).

  • Fit Runs SnugVery Roomy
  • Warmth Not WarmExtremely Warm
  • How would you rate the quality? Not greatExcellent
Brian J.

Ptarmigan Comfort

Excellent sleeping bag and happier with it than any other comparable temp bag I've purchased. Would definitely recommend your brand to my mountain friends or anyone in need of a cold weather bag. The customer support was instrumental and fantastic in helping me decide which bag to get with a boat load of info and questions answered. Full points to FF's.