Whether on your boat or traversing the rocky shoreline heading out for a day of diving, RIFFEs fin socks offer exceptional comfort and protection. Double sided, ultra stretch, bonded Nylon 5 panel design ensures a form fit. Can be worn alone or with fins. Smooth interior for comfort and ease of entry and exit from sock. Extra durable outer material for wear. Flexible slip resistant tread. Sold in pairs. 3.5mm thickness Neoprene Available Sizes: S, M, L, XL, 2X Left and right foot specific. Features Neoprene Bonded w/ Nylon Flexible resistant tread Left and Right foot specific