The rope is very strong with strong knots, can last long and bite resistant. Made of very good material, natural cotton knotted chew rope. 100 % non-toxic dye made of cotton, strong knots and flexible weave that massage your pet’s gums, help clean teeth with every chew. Clean cotton teeth and woven ball so the dog offers infinite pleasure. Strong bite resistance, so that home alone dogs will not be lonely, it is not easy to bite badly.