The Petface Outdoor Paws Mighty products are made from an extra strong material (ETPU) which has excellent resilience to biting and high wear resistance, it is soft to touch, lightweight and has great elasticity. ETPU (Expanded Thermoplastic Polyurethane) is an extra strong, non toxic and environmentally friendly material. The Medium Mighty Ball is perfect for throw and fetch games with an exciting bounce and can be used in most standard ball throwers. Resistant to heavy chewing, perfect for long lasting fun for your four legged friend. Floats on water for those pups who love to retrieve from the lake or sea. Easy to clean, simply rinse under water or wipe clean. Pack contains 2 Medium Mighty Balls.