The Feathered Friends Ptarmigan EX -25 is a unisex expedition mummy bag for polar and high-altitude conditions, filled with 1006 g of RDS-certified 900+ fill power goose down inside a waterproof-breathable Pertex Shield EX shell. At 1708 g total weight and a -32°C (-25°F) limit rating, it sits among the heavier, more rugged bags in the EX line — trading some of the weight savings the lighter YF models offer for reliability in extreme weather.
The regular-length cut (up to 182 cm) runs fairly narrow compared to roomier bags in the range — 145 cm shoulder, 135 cm hip, 97 cm foot box — meaning a closer fit with less dead air to warm. The full-length, two-way zipper on the left side is backed by both a draft collar and a draft tube, and the 3D anatomical hood together with an internal pocket for batteries or a phone are practical touches for multi-day expeditions.
It's handcrafted in Seattle and also available in a red colorway.
Specifications
Color
Red
Limit Temperature
-32 °C
Temperature Rating Standard
Manufacturer rated
Season Rating
5-season (expedition)
Total Weight
1708 g (3.77 lb)
Fill Weight
1006 g (2.22 lb)
Shoulder Width
145 cm (4.8 ft)
Hip Width
135 cm (4.4 ft)
Foot Box Width
97 cm (3.2 ft)
Insulation Type
Goose down
Fill Power
900
Shape
Mummy
Zipper Side
Left
Zipper Length
Full length
Two-Way Zipper
✓
Shell Fabric
Pertex Shield EX
Liner Fabric
20D nylon taffeta
Water Resistance
Waterproof/breathable membrane
Draft Collar
✓
Draft Tube
✓
Hood Type
3D anatomical
Internal Pocket
✓
Size Category
Regular
Maximum User Height
182 cm (6.0 ft)
Gender-Specific Fit
Unisex
RDS Certified Down
✓
Country of Manufacture
USA
Warmth-to-Weight Ratio f(x)
18.7 °C/kg
Fill Efficiency f(x)
3.18 °C/100g
Weight per Degree f(x)
53.4 g/°C
Bag Type
Mummy sleeping bag
Where to buy
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Category context Sleeping Bags (417 products)
Weight
Heavier end· mainstream zone 819–1420 g· ranked 365 of 418