... 6-13, 39-47 - Packing:Polybag neoprene bootfoot,neoprene socks,neoprene footwear,neoprene surfing socksneoprene sock:1) Material: Neoprene, a synthetic rubber that is waterproof ... windproof; 2) Thickness: As per request; 3) Flexible and warm soft neoprene upper, will stretch to fit almost any ankle; 4) Hard ...