Keep the good times rolling with Mammoth’s Tirebiter II Rope Dog Toy! This heavy-duty toy is crafted with a new advanced natural rubber material and a double knotted rope to help it stand up to even longer-lasting play. Mammoth Tirebiter toys are sustainably manufactured in a North American factory and proudly designed and developed in the USA with USA materials. They are also designed with a progressive chew system, which means your pup will slowly start to gain strength as he works his way up in toy size! Roll, toss or tug the tire to encourage interactive play and keep your canine companion engaged and encourage healthy exercise.