Comfortable, light weight, durable, easy to pack, perfect under a full foot fin, and a must have for the tropic diver or snorkeler. Wear these with any of our full foot fins or with the Deep See Aqua Glide fins. They are also great with water sandals or other shoes for rafting, canoeing, kayaking, mountain biking or any active sport where your feet need to stay warm while wet.Constructed of thin, 0.5mm neoprene sandwiched between durable layers of nylon. Flat-lock stitching for comfort and low profile under fins. Thousand-channel sole pattern for grip.