Like the Triton Fin, the Triton Pro combines elements of classic vented finswith an updated design and modern materials. The result is a full-size OpenHeel Fin thats lightweight, flexible, and powerful. The brisk snap thatprovides impressive power and acceleration. The large vents direct thrust forefficient kicking in a flutter or frog style kick. The open heel fin has anon-adjustable Stainless Steel Spring Straps with quick-release buckles an alarge heel pull tab that combined for easy donning and doffing. The SherwoodTriton Fins are made from a lightweight, durable Thermoplastic Polyurethane(TPU) material.