These Martingale Collars are well made from high-quality material. Our martingale collars use heavy-duty nylon webbings, they are strong, soft, and stylish. These simple classic style collars are perfect for any dogs (not suitable for small dogs). Also, they are excellent for preventing your dog from pulling or backing out of their collar. Features : - Solid brass snap hooks - Strong but soft nylon webbing - Machine washable Well made buy very high and durable quality and built to last - Heavy-duty 1" nylon webbing - Solid Brass Loops & D-Rings - Military grade tri-glide Please Notes : Do not allow your dog to go outdoors off-leash in a martingale collar. Do not put your dog in a kennel/crate with his/her martingale collar on.