Foam lockets are suitable for proper throwing foam training. Even those who cant throw the ball well can enjoy recreational fun. The head of the locket is made of durable and extremely flexible EVA material that can be used indoors as well. Foam locket color set Not only can it be used for separating teams, but it also comes in a variety of colors to bring out the motivation of children. It is a short type that increases difficulty and helps to develop proper form.