The dexshell thermlite sock is an over the ankle length lightweight merino wool sock the thermlite is ideal for daily walking hiking and other outdoor activities in cold wet weather conditions the lightweight merino wool ensures ultimate comfort and warmth plus the built in moisture wicking performance inner on the dexshell sock will provide you fresh feeling feet all day long fully waterproof and breathable the dexshell thermlite sock is a must have for your year round wardrobe keeping y