Model: interchangeable blade fin with closed foot pocket. Foot pocket material: made in two materials with different densities. Hard thermoplastic rubber for the sole and ribs, and soft around the foot to optimize the comfort/performance ratio. Blade material: special technopolymer with a formula that emphasizes the flexibility and responsiveness of the blade. The special brown, green, red and blue camouflage effect is achieved using ICS (injection color system) technology.