SWIM 23% FASTER The hydrodynamic design gives you webbed fingers. They increase resistance, build strength and power, allowing you to swim a lot faster, just like a frog or an otter! DESIGN FROM NATURE Animals that live in water use their webbed feet to swim swiftly. HAVE FUN Wearing them is simply a lot of fun, you will feel and look like Aquaman or a mermaid. Perfect for scuba-diving, snorkeling, surfing, training, and regular swimming. They are made from high-quality silicone with extra elasticity and a special hydrodynamic shape that increases your swimming performance by creating water pockets between your fingers. Features: Speed - Swim and catch waves much faster. Resistance - Improves your technique; great for training. Hydro-Grip - Provides full flexibility of your hand and increases hold on slippery surfaces. Specifications: S (Children): length: 15cm, width: 4cm, external diameter: 21cm M (Teens): length: 17cm, width: 5.5cm, external diameter: 24cm L (Adults): length: 19cm, width: 6.5cm, external diameter: 28cm