For serious drysuit divers the Scubapro Sub Sox is a must. Offering unparalleled insulation from 3 layers of wear resistant fabrics the Sub Sox will keep your feet impressively warm. The inner fleece is soft and breathable, rapidly wicking sweat away from your feet for improved comfort and warmth. The second is comprised of 100g of hollow fibre high tech insulation which retains heat efficiently and isolates your feet from the colder air in your boots helping keeping your feet the ideal temperature. The robust outer nylon layer protects the socks from damage.