Swimming Strength Training Belt with Resistance Umbrella Product Features: OOTDTY Improve Swimming Skills: By increasing water resistance during swimming, swimmers can build muscle strength, improve posture, and increase speed. Safe and Effective: Provides stable strength training results without posing any safety risks to the user. It is a safe and effective swimming training tool. Comfortable Fit: Made of nylon + PP material, it fits comfortably. The sturdy and durable nylon strap has good abrasion resistance. Equipped with a 360-degree rotating quick-release buckle, it is sturdy, durable, highly flexible, and not easily twisted. Multiple Sizes Available: You can choose the appropriate size according to your personal needs and abilities. Users can gradually increase the resistance, thereby gradually improving their swimming ability. Specifications: Material: Nylon + PP Color: Black/Yellow Canopy Diameter: 20cm (7.87 inches) / 30cm (11.81 inches) / 40cm (15.75 inches) Package Includes: 1 Parachute Note: Please allow 1-2cm error due to manual measurement. Please ensure you do not mind before placing an order. Due to differences in monitors, the picture may not reflect the actual color of the product.