Improved aquatic safety Safety lock and attached locking mechanism prevent accidental openings in the water, helping keep children safe while swimming under supervision. Enhanced grip and control Nonslip surfaces increase handheld friction for a stable grip, improving steering and overall control during kicks. Flexible modular design Three interchangeable buoyancy layers provide three levels of adjustable buoyancy, enabling a customized swimming experience. (Removed customized related part) Quick disassembly and reassembly make it easy to adapt as a child progresses or to switch between configurations for different activities. Durable and skin friendly Made from resilience hypoallergenic material that is gentle on a child's skin during extended use. Delivers lasting comfort, durability, and safety for active play without irritation. 23 practical use scenarios Swim lessons and learning to swim: start with higher buoyancy layers to build confidence, then reduce buoyancy as skills improve, using the same board without changing equipment. Family pool time and skill practice: adjust buoyancy to match the child's ability, enabling safe practice of kicks, balance, and breath control under supervision. Travel and gym pool sessions: quick setup and secure fit ensure reliable performance in different environments, making it easier to maintain practice routines away from home.