Our backyard was the inspiration for the Catalina Fin Sock. Trips to this local island off the coast of California proved to be the ideal location for developing an improved fin sock. Keep your feet warm and cozy, while protected from slips and rocky shorelines in the Catalina Fin Sock. Double-sided, Nylon bonded 2mm Neoprene Non-Slip High-Density Sole Pattern Durable Abrasion Resistant Fabric Sole Panel 5 Panel sock molds around the foot for an ergonomic fit Raw edge foot opening for ultra-stretch, non-restrictive Glued and blind stitched seams for optimum warmth and comfort Inner spot tape prevents leaks at intersections and tears at stress points Catalina contour map art Left and Right foot specific Sold in pairs.