Our Foam Dodgeballs are made of environmentally friendly polyurethane. New physical foaming production process, millions of micro-pores absorb sound. Easy to Catch and Throw. Great for Indoor and Outdoor Play . This soft foam ball makes almost no sound when hitting the backboard, rim, or ground/wall. They are so light they cant really knock things over or do any damage while playing in the house. 8 1/4 inch diameter, solid foam ball can withstand strong pressure and quickly rebound. Whether it be dodgeball, kickball, basketball, school/camp games, or even just playing catch, these bouncy balls will make sure your child stays active and healthy. These balls are useful for all kids and adults.