Full surround arm design: makes it easy to wear and prevents the vest from falling off easily, offering comprehensive protection for kids. The ergonomic design allows children to adapt quickly in water and maintain balance while swimming. Perfectly-sized for kids of all ages:these swim arm bands are portable with a compact design that can be easily inflated and folded. They are widely used in bathing areas, swimming pools, beaches, seashores, etc., making them perfect gifts on summer days. Comfortable and Breathable: Made from soft and comfortable materials, allowing kids to swim with comfort and freedom. Durable and Long-lasting: Crafted with high-quality materials, the vest is sturdy, reliable, and built to withstand extended swim sessions. Guaranteed Service: Please note that you should inflate the inner liner first before inflating the outer liner when using this product correctly.If you are unsatisfied with our swim trainer vestplease contact usand we will do our best to solve your problem.Please kindly note that this product is not intended as a life-saving device In addition,the package does NOT include an air pump.