My son broke his wrist two weeks before we were to leave for camping. He loves to swim...in fact, I think he is part fish... He would have been miserable if he had not be allowed to swim at the beach. The Bloccs cast protector was exactly what we needed. It fit perfectly, was comfortable and did not let in a drop of water. He was able to swim and play just as he would have without the cast. At first we wondered if it was necessary to spend the money on a cast protector...but it was totally worth it and we would do it again. Thank you!