Made tough, durable, and strong. HammerHead Tuff Sox socks are designed with an anatomical cut around the ankles to prevent water from seeping in during the kick cycle. Durable strong pad soles with red HammerHead grip sharks are tough yet flexible ensuring maximum power transfer to the footpocket. Fully glued and blind stitched complete the finish quality on these socks making them the ultimate freediver sock for tropical waters. Anatomical Cut Around the Ankles for a Better Fit Open-Cell Cuff to Prevent Heat Loss and Water Entry Fully Glued and Double Blind Stiched Flexable Grip Soles