Martingale Dog Collar - Turquoise - Extra Large The webbing is made of soft and smooth nylon Limited restriction on a dog's neck, combining the safety of non-slip collars and the comfort of non-choke ones 4 sizes to best fit your dog Size Regular Mode: Regular Mode: 50 to 83 cm / 19.8 to 32.8 inches - Size Training Mode: Training Mode: 39 to 70 cm / 15.4 to 27.6 inches 19 beautiful bright colors to choose from