Durable EVA foam provides long lasting shape stability in water and resists chlorine and saltwater for extended use. Progressive skill development supports swimmers as they move from basic buoyancy to more advanced kicking and body position. Versatile use adapts to indoor pools, outdoor pools, and natural lakes, maintaining buoyancy and stability across environments. Adjustable fit with secure straps accommodates a range of waist sizes for focused balance training during learning. Material and compatibility: EVA foam is lightweight, quick-drying, and easy to clean. Fits most swimmers. Not a substitute for supervision. Use scenarios - Beginner in a shallow indoor pool learning flotation and kick drills with supervision. - Intermediate practice in a larger outdoor pool or calm lake focusing on balance and propulsion as confidence grows. - Gentle water cardio or rehab sessions in a spa pool or calm water.