Petsport USA Jr. Set of 2 Tuff Balls Dog Toys Safety Tested and ensured for your pet Made using safe, quality, materials that are harmless to your pet Designed in the USA with quality goods Extra thick natural rubber walls give extra durability and bounce non-toxic - no chemicals added for bounce like regular tennis balls Extra thick natural rubber walls give extra durability and bounce non-toxic - no chemicals added for bounce like regular tennis balls Non-abrasive felt won't wear down dog's teeth like regular tennis balls Colofast dye won't stain carpet like regular tennis balls