The unique block structure prevents the down from shifting, and by using 95/5 Polish white goose down, it is lightweight, compact, and has excellent heat retention.

The outer material is eVent® WINDPROOF, which is highly water-resistant and breathable, making it resistant to getting wet. (It is not completely waterproof.)

The bottom has an anti-slip coating, making it convenient for use in mountain huts, etc.

The down is only filled up to the elastic shirring at the ankles. Stuff bag included.