The new Hybrid sock is made of soft 2.5mm neoprene with a textured sole that provides light non-slip protection. Featuring 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 kick around on a chilly boat deck. Whichever you choose, your feet will love you for it. Great for freedivers.