IMPROVE YOUR PERFORMANCE: arena Powerfin Pro II short fins have a short, angled blade to maximize propulsion, while the open heel provides flexibility, comfort, and increased leg speed; grooved sides provide better control HONE YOUR TECHNIQUE: These short swimming pool fins are designed for intensive training aimed at perfecting your stroke technique; their design helps develop strength and efficiency of leg movements FOR COMPETITIVE SWIMMERS: Unisex arena Powerfin short training fins are specially designed for competitive athletes; they offer significant benefits during training and improve performance in the water LESS IRRITATION: The high-quality material from which these pool half fins are constructed reduces the risk of irritation and blisters; the opening on the big toe is differentiated for the right and left foot 100% SILICONE: These pool fins are made of 100% soft and durable silicone to provide comfort during use; PVC-free