Product description Material: silicone Size (M): 17 * 5.5cm Size (L): 19 * 6.5cm Color: light blue Weight (M): 40g Weight (L): 40g Suitable temperature: -40 Celsius to 230 Celsius Quantity: 1 pair Scope of delivery: 1 pair of hand swim fins 1. Elasticity and special cut hydrodynamic shape, reusable design, offers greater stability for swimming palms. 2. Swimming like a frog Increases resistance and improves technique. Provide the user with the ultimate in swimming efficiency, ideal for a beginner or someone who wants to swim faster. 3. Made of high quality silicone soft and comfortable, safe and environmentally friendly. Lightweight, convenient to store and carry. 4. Can be included in any water activity: Suitable for competitive swimming, surfing, diving, water polo, swimming pool, triathlon training, open water swimming, aqua aerobics, water rehabilitation and therapy, etc. 5. Hydro Grip: Webbed swimming allows full flexibility of your hand and hold on slippery surfaces. Hydrodynamic design makes it easy to use. Deliver the user with the highest level of efficiency when swimming