Dean and Tyler's D&T Leather Martingale Collar is a great choice for pets who like to slip out of their collar. This Leather Martingale Collar will be the solution to your problem. When a dog pulls on the Martingale Collar the collar becomes tighter, but stops at a point to prevent injury. This choke collar features Herm Sprenger hardware with high quality leather and stainless steel rings. This collar is available in lengths of 18" to 26" and measures 3/4" wide (chain thickness measures 1/6"). There are two color options available black and brown.