Trixie Stop The Pull Dog Collar-This double-layer nylon collar is designed for more comfort and control with much less stress on your dog’s neck. Premium quality Dog collar. Fully adjustable to fit your dog’s neck perfectly. Easily washable with a strong metal chain and clip ring attachment. Can be used while training dogs for leash walking. The round ring can be used to connect to the leash. Unique limited closure prevents the choke coil from becoming too tight when your dog pulls, the collar will become tighten but not make your pet suffocate when your pet stops pulling, the collar will become loose soon. Hope you and your pet have more comfortable and safe training.