TireBiters are real tire tough for heavy-duty chomping and interactive play. Patented two-ply nylon formula flosses while dogs chew. Mammoth ® Tirebiter ® with Flossy Chews ® rope are made from specially formulated natural rubber with two-ply nylon. These real-tire-tough favorites are fun, natural and perfect for interactive play, tossing, and tugging. Choose the right size toy based on your dog's body size and chewing habits. We want you to get the most out of your play time together.