Harkila Driven Hunt HWS Insulated TrousersHarkila Driven Hunt HWS Insulated Trousers The Driven Hunt HWS Insulated trousers are thick and warm hunting trousers with a variety of built in smart features. They are lined with a thick Thermo Poly Shield Fill wadding and have a windproof and waterproof HWS membrane. This makes them ideal for static hunting in the cold autumn and winter months, in the snow, sleet and rain. To see more from Harkila, visit the Harkila Collection.