Diving Fins Flippers For Swimming Mermaid Watersport Snorkeling Training Equipment Swim Fins Material: PP+TPR; TPR foot pocket, more comfortable and prevents irritation.Fit for shoes 24-37 sizes; Automatic lock for your security escor and easy to use,Quick release foot strap allows for fin to be easily removed. Adjustable Velcro strap for safe and fun Use,great for Training and Open Water swims. Mermaid Fins Design Transform Any Swimmer Into An Amazing Mermaid Much Fun Way to Exercise,Perfect training gear for freestyle, butterfly backstroke swimming, improves ankle flexibility, and strengthen leg power;