Pet K9 Ballistics Round TUFF Dog Bed, Durable rip stop fibers, Size: X-Large (54"), Color: Blue Supply Store/Shop Our chew resistant dog beds are woven from our own proprietary blend of super durable, double woven. Rip Stop, ballistic fibers. This proprietary blend has created some of the toughest material. These extremely durable dog beds are perfect for pets who like to chew. Pet owners who have tried other chew resistant dog beds may have better success with these dog beds. They are also perfect for the pet owner who is looking for a bed to last a lifetime.