Elastic stretch, anti-abrasion and scratch resistance: good elasticity, stretch and resilience freely, can avoid scratches by sharping objects such as sand and stone and bite by harmful organisms, and make your children feel more at ease when playing in the water. Round neck hemming: The round neck design can effectively protect the neck. The edge of the collar is meticulously hemmed to prevent the edge from abrading the skin during activities. The design is thoughtful and comfortable. Easy to put on and take off: The zipper design is easy to put on and take off, comfortable and soft. Suitable for many occasions: indoor and outdoor swimming, beach playing, snorkeling, boating and other water sports. Please refer to size chart in the left picture.