Warm feet are happy feet. HammerHead En Fuego socks are designed specifically for coldwater freedivers with an extra long open cell seal and an anatomical cut around the ankles to prevent water from seeping in during the kick cycle. Durable strong pad soles are tough yet flexible ensuring maximum power transfer to the footpocket. Fully glued and blind stitched complete the finnish quality on these socks making them the ultimate freediver sock for cold water.