Champion Sports - CSIRXSPDRSET Safe enough for children and rugged enough for adults, Rhino Skin Spider Balls utilize a high-tech design to provide a long-lasting, no-sting product that's perfect for gym class, the playground and more. They are made for indoor and outdoor use. Colorful design, a lightweight foam core, soft exterior and tear-resistant coating make these balls a top choice for dodgeball, foursquare and other popular playground games. These balls are sting-resistant, low-density and low-bounce. Set of balls comes with a mesh bag for easy transport.