The Artful Canine Scottish Plaid Martingale Dog Collar, Medium Dogs 20-35 lbs (Collar: 3/4 wide, 10" - 16" long) Limited Choke action makes this dog collar more humane for control (over choke collars). A great training dog collar for leash/command training. Martingale collars are excellent as a safety collar. Adjust to fit your dogs neck (like a regular collar) it will keep your dogs from slipping out/backing out of it when on leash. Who said training & control has to be boring? This martingale is fashionable, comfortable, durable, attractive and machine washable martingale collar 3/4" wide colorfast polyester plaid sewn over heavy-duty black nylon webbing, made in the USA by The Artful Canine