I used this for one season of swimming at the beach. I put this on my child because I thought they might not be able to regulate their body temperature well yet. It's made of sturdy fabric. It protected their skin, and I felt safe putting it on them. They outgrew it, and I bought another Splash About suit of the same type, so I'm selling this one. It's a used item. Please consider this before purchasing. Size: XL. Fits perfectly for size 80. Reference price: ¥6600 (Rakuten) Color: Noah's Ark ■ Reliable thermal insulation! This is a wetsuit developed in response to requests from swimming schools for a swimsuit that keeps babies warm in the water. Made of 1mm thick, flexible wetsuit material, it's designed to keep babies warm and comfortable in the water. Babies can't move around as much as older children, so they feel cold more quickly. ■ Built-in diaper function! It incorporates a Happy Nappy (swim pants with a diaper function), which is essential for babies' swimming. Therefore, disposable swim diapers are not needed. ■ Easy to change! The back of the upper body opens completely, making it easy to change. Also, the soft finish that fits comfortably on the body is ideal for small babies. ■ Safe for children with sensitive skin! It keeps protective cream in place, so children with sensitive skin can continue their swimming lessons without interruption. ■ Safe because it's non-slip even when wet! The moderate stiffness of the wear makes it easier to hold a baby who is moving around, giving parents peace of mind. ■ Excellent UV protection! With the highest standard UPF50+ processing, you can rest assured about UV protection. It can also be used as a rash guard.