This water splash pad play mat is constructed from Heavy Duty Pvc that has been thoroughly tested. This kids water fill play mat is an essential tool for developing solid head, neck and shoulder muscles as well as honing hand eye coordination fine motor and social skills It is a sensory delight that enhances brain development. Simply fill the outer ring with air and the inner mat with your desired level of tap water set it on the floor and let the fun begin It folds easily when empty into your purse or toy bag to bring along anywhere you go.