Comfortable and secure fit: Adjustable size range of 14 5 cm; these fins provide a snug fit that grows with your child, ensuring comfort during all aquatic activities. PVC material: Made from PVC; these swimming fins are designed for durability and can handle frequent use by enthusiastic young swimmers. Nonslip design for stability: The nonslip bottom ensures a secure grip while swimming or playing in the pool, enhancing safety and comfort for kids. Use scenario: Swim lessons or kicking drills to develop leg strength and kicking technique with stable, comfortable fins. Use scenario: Recreational pool time and family swimming to help kids move through the water more easily and enjoy active water play. Use scenario: Beach or vacation pool sessions in calm water to practice kicks and improve water confidence during trips.