DexShell Watch Hat The innovative Watch Hat keeps you dry and warm in windy and snowy weather conditions, thanks to the amazing DexFuze technology. Utilising DexShell's DexFuze technology, creates a unique construction that ensures you stay dry, even in the rain and is also exceptionally comfortable against your skin. The hat is lightweight, and smooth to touch for excellent wear, and has a sleek design. It is a great hat for cold weather, due to the fleece-lined inner which works as a great insulator for your head, and prevents unpleasant windchills from entering. A Porelle membrane means the garment is durable, however is exceptionally waterproof and breathable for optimum comfort.