Reliable protection Designed with a safety lock and a connected lock function to help prevent accidents during water activities. This helps provide dependable protection for children during use. Grip technology Nonslip grip optimizes handheld friction to enhance stability. Enables children to maintain clear control while using the kick board. Buoyancy control Three modular layers allow adjustment of hydrodynamic thrust through different combinations. Layers are removable to adapt to beginners swimming exercises and progressiveness in training. Delicate touch Hypoallergenic material with resilience creates a soft, comfortable surface. Suitable for extended play sessions without causing skin discomfort. Use scenarios Swimming lessons for kids: practice kick technique with adjustable buoyancy to gradually increase difficulty and build confidence in the water. Family pool time: safe grip and a soft, comfortable surface support relaxed play and secure handling for children. Waterbased conditioning or rehabilitation: progressively adjust buoyancy to tailor intensity and support gentle aquatic activities. Specifications and compatibility notes Function: safety lock, connected lock, nonslip grip, modular buoyancy, hypoallergenic material. Material: hypoallergenic and resilience surface for comfort. Performance: focused on safety, grip, adjustability, and childfriendly comfort. Size and other detailed specifications are not provided in this description.