Nothing grabs the pocket of your freediving fins like a grip shark. What's a grip shark? Only the coolest, strongest, most durable pad soles of HammerHead's Tuff Socks. The little red HammerHead grip sharks chomp down and maximize power transfer to your foot pocket. OK, so they don't really chomp down, but they do provide an excellent traction for the sole of your foot in the foot pocket, maximizing power transfer. Fully glued and blind stitched, the 1.5mm neoprene is ideal for warm water spearfishing, freediving, or just plain old comfort while wearing full foot fins. The anatomical cut around the ankles keeps water from creeping in during your powerstrokes. Grippy, non-rippy, and non-slippy, these HammerHead Tuff socks make your feet as tough as your spearfishing game! Size Breakdown to Men's Shoe Sizes: XS - 3/4 S - 5/6 M - 7/8 L - 9/10 XL - 11/12 2XL - 13/14