100% nylon. Ripstop fabric. Zippered fly with press-stud fastening. Down-filled. Elasticated waistband with drawcord fastening. Two front pockets. Regular fit. Nanga, the widely respected all-weather wizards, refuse to let any poe-faced scoundrel tell them that down ought to be reserved solely for duvets, jackets and geeses derrieres. In fact, theyve gone so far as to load up some flex-friendly, water-resilient bottoms with the stuff, creating not only a pair you could battle a blizzard in, but the experience that you dont have any trousers on at all, thanks to those lighter-than-lightweight credentials and that limb-liberating design.