The Hybrid Sock is made of soft 2.5mm neoprene with a textured sole that provides light non-slip feature for walking on wet boat decks. Featuring 100% high-stretch Everflex Nylon outside and a plush interior lining for warmth and comfort, you can wear the Hybrid sock inside your dive boot for added warmth, as a liner inside a full foot fin, or by itself to walk around on a chilly boat deck. Whichever you choose, your feet will love you for it.