Customizable fit for all swimmers - Adjustable Velcro design provides a tailored fit for users of different ages and levels, including children, women, and beginners. This enhances comfort during training sessions and reduces slip or irritation. Aerodynamic resistance training - The belt delivers parachute-like water resistance to simulate dynamic drag. This increases water resistance during swims, helping to build strength and power for more effective workouts and faster improvements in speed and technique. Comfortable neoprene construction - Made with 5 mm thick neoprene for a lightweight, soft, and comfortable feel against the body. The compact design is easy to carry, store, and wear during sessions without adding unnecessary bulk. Outlast nylon fabric - Constructed with coated nylon fabric that is waterproof and wear-resistant. The robust nylon material ensures durability, making the belt a reliable training accessory over time. Use scenarios - Lap swimming training: Use during routine laps to gradually build endurance and swimming strength without changing your stroke dynamics. - Interval and sprint training: Incorporate into high-intensity sets to boost explosiveness and overall power in the water. - Group or youth training: Adjustable fit accommodates swimmers of different sizes and skill levels, making it suitable for classes, camps, or personal practice.