Tail pad with raised toe and heel 'gas pedals'. Gorilla use high-quality EVA and PE foams to make a 4 piece tail-pad that is ultra-grippy, light-weight and does not absorb water. We use industrial grade adhesives to ensure Gorilla Grip stays stuck. Aztec Groove is a tighter groove pattern that, similar to wax, works as a layer of traction. The pattern is specifically designed with each bump having three levels to match the variety of pressures placed on it by different size surfers during different maneuvers.