- Safe, adjustable training tool: Breathable material and an adjustable strap for a comfortable, secure fit. The buoyant core supports targeted practice of kicking, balance, and stroke drills. - Skin-friendly, durable EVA: Soft, skin-friendly EVA minimizes chafing; tear-resistant construction and reliable watertightness maintain buoyancy and performance over time. - Flexible, family-friendly design: One strap fits children and adults, enabling joint training for the whole family. Ideal for swimming lessons, practice sessions, or light water sports. - Ready to use and secure: No setup required. Water-resistant quick-release fastening delivers a secure hold during all movement and allows easy removal when done. - Practical use scenarios: 1) Kids’ swimming lessons at a community pool with a coach or parent supervising. 2) Family training sessions in outdoor pools, lakes, or the sea. 3) Buoyancy-assisted conditioning for water sports, rehab, or fitness in shallow water.