Features: Improve swimming skills by increasing water resistance during swimming to help swimmers exercise muscle strength, improve posture, and increase speed. Safe and effective: Provides stable resistance training without safety hazards, making it a safe and effective swimming training tool. Comfortable fit: Made of Nylon and PP material with a secure fit. Durable nylon webbing offers good wear resistance. Equipped with a 360-degree rotating quick-release buckle for firmness, durability, high flexibility, and no twisting. Multiple sizes available: Choose based on personal needs and ability level. Users can gradually increase resistance to improve swimming performance. Specifications: Material: Nylon + PP Color: Black/Yellow Resistance Umbrella Diameter: 20cm (7.87 inch), 30cm (11.81 inch), 40cm (15.75 inch) Package Includes: 1 Set Swim Parachute Note: Please allow 1-2cm measurement variation due to manual measuring. Due to differences in monitor displays, the actual color may vary slightly from the image.