100% nylon fabric. Soft, smooth and not easy to fade. We follow AATCC color fastness standards. Machine wash or hand wash in cold water only. Wash with like color. Reinforced seams are durable. All seam joints are folded over to make it smooth. This makes it more comfortable for you and your furry friend to use. Our collars are designed for gait training and everyday use. Be sure to adjust the collar to best fit your furry friend's neck. For maximum comfort, we recommend at least 2 inches (about 2 fingers) of slack between the collar and the neck. Product Name: Tactical Collar/Dog Collar Product Material: : 1000D nylon material Product color: black/green/khaki/camouflage product package: : opp 18*10*5cm product weight: collar Size M/142g Size L/152g Code XL/165g Tow rope/108g Product size: Width 3.8cm Size M (36-48cm) Size L (42-54cm) Size XL (50-62cm) Quantity: 1 * tactical collar + 1 * pull rope