The Artful Canine Martingale Dog Collar, Macgreggor Plaid, Large Dogs 35-60 lbs, (Collar: 1" Wide, 13" - 20" long) Limited Choke action when adjusted to fit neck keeps dogs from slipping out of collar when on leash Martingale collars are excellent as a safety collar, or as a training collar on leash Fashionable, comfortable, durable, attractive, colorfast and machine washable collar 1" wide colorfast red polyester plaid sewn over heavy-duty red nylon webbing