Ptarmigan ES -25 Sleeping Bag

We expect the Ptarmigan ES -25 to be available early Fall 2026. Hit the "Notify Me When Available" button to be the first to know when they are back in stock. 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, including the cutting-edge Pertex® Shield Air fabric, 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.

ES: Winter & Expedition. Pertex® Shield  15 denier with 40 denier rip-stop reinforcement fabric with  w ater-resistant/ breathable coating with   3 Layer  Pertex® Shield Air electrospun laminated fabric. 

Details

• Mummy shape (average width) with #5 YKK two-way zipper with locking sliders

• Pertex ®   Shield EX water-resistant/breathable shell with DWR with a Pertex ® Shield Air electrospun panel on the top middle for added breathability

• NetPlus® post-consumer recycled nylon interior fabric

• 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