Our industry leading Tuff Balls®, also comes scented with natural mint oil! Mint Tuff Balls® are perfect to freshen the breath of your K9 companion. Mint Tuff Balls are made with thick, natural virgin rubber to provide durability and better bounce. They use polyester felt instead of the standard wool felt used in a competition ball, because polyester felt won't wear down your dog's teeth. Tuff Balls are the first tennis balls made specifically for dogs, with millions sold and a name you can trust.