One of the strongest collars on the market. Constructed of two layers of polyester fibers imbedded in rubber. Top surface wipes clean, is soil and odor resistant and water repellent for those dogs that spend a lot of time in the water. Can be cut off and holes added without burning or melting. Ring-in-Center style will roll over to keep your dog from hanging on fences. For correct collar size, add 4 inches to your dogs exact neck size.