Chuckit ® Tennis Balls are made of high-quality materials and specifically designed for the game of fetch. Constructed from natural rubber and featuring an extra-thick rubber core and durable material that floats in water. The bright colours provide improve visibility during play and help to prevent the ball from being lost. Use alone, or with any Medium sized Chuckit Launcher. These high-bouncing tennis balls are available in sizes small; medium; large; and with one; two; and four-pack options. The Chuckit Tennis Ball's soft felt surface is also gentle on dogs' mouths for comfortable carrying. NATURAL AND DURABLE: Featuring an extra-thick natural rubber core, Chuckit Tennis balls are durable for long-term useHIGH-VISIBILITY COLORS: Pets and pet parents can easily spot the bright blue and orange tennis balls for dogs during outdoor playHIGH-BOUNCING BALLS: The Chuckit tennis balls are made from natural high-bounce rubber that encourages dogs to leap and jumpFLOATS IN WATER: Made of a lightweight rubber material, Chuckit 's Tennis Balls are great water toys for dogs that enjoy fetch at the pool or the beach