Build 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, ensuring a long service life. Versatile applications - Improves balance and control in the water with a versatile swim belt. - Suitable for pool training, open water training, and swimming lessons for adults. Easy operation and performance - Inflation and buoyancy are adjustable with a single air pump. - Fast inflation and deflation enabled by an innovative air valve system, allowing quick adjustments to meet different training needs. Adjustable comfort and safety - Customizable tightness for a comfortable, flexible fit. - Distributes waist pressure more evenly for added safety and comfort, and helps prevent unwanted gliding or marking. Use scenarios - Pool training sessions to improve balance and stroke control in a controlled environment. - Open water training to maintain buoyancy and stability in real-world conditions. - Adult swimming lessons to support learning with adjustable buoyancy and a secure fit.