1. Build construction and materials: made of high density canvas and PVC composite material with excellent tear resistance and a double reinforcement process to prevent leakage or deformation, delivering a long service life 2. Wide usage: suitable for pool training, open water practice and swimming lessons; this multifunctional inflatable buoyancy belt helps adult beginners cope with freshwater or seawater environments easily 3. Easy to use: lift your swim training across different levels with our swim belt; fast inflation and buoyancy adjustment in just 30 seconds using the innovative air valve structure that requires only an air pump to achieve maximum setting 4. Comfort and fit: Ni levels can be adjusted easily for a more comfortable and flexible wear; ensures safety and comfort by evenly distributing pressure, preventing gliding or marking Use scenarios: - Pool training and swimming lessons for adults and beginners - Open water practice in freshwater or seawater environments - Progressive swim training across different skill levels with quick buoyancy adjustments