This is the Poseidon Trident Fin Short Rigid Rubber Fins for Technical DivingFeatures: Made from 100% rubber with rubber coated stainless steel strap Compact design for efficient mobility Fin equipped with dynamic edge for powerful thrusts. Stainless steel strap with easy grip High force fin with edges for maneuverability Colors: Black, Red Ideal for those who prefer a rigid rubber fin, the Trident comes with a stainless steel strap for easy removal. One of the shortest fins of its kind, Poseidon&';s Trident has an edge on the side designed for heightened maneuverability, making it popular among technical divers. "