100% polyester. Fleeceback fabric. Elasticated waist with built-in belt. Zip fly with button closure. Two slash pockets. One back welt pocket with Velcro closure. Tapered leg. Regular fit. Gramiccis Bonding Knit Fleece Narrow Rib Pants are a pretty ingenious set of slacks. Made from toasty ripstop, these could be deployed in a variety of different situations, from taking it easy back at base camp after a long day conquering the peaks, to cotching on the sofa all day watching bobbins on TV. The exterior looks a bit like TV static too. Very nice.