The GoGo Comfy Martingale Dog Collars are made from the highest-quality materials available on the market. Excellent for training and designed for gentle control. A safer alternative to a choke collar. The comfortable, soft, durable nylon gets a dog's attention without choking. The specially crafted hardware was designed for a smooth and quick release. The durable YKK plastic buckle makes for gentle, trouble-free collar removal. No twisting and trying to pull over your pet's head. The Martingale Dog Collars come with a lifetime guarantee. That's how well collars are made. Available in various sizes and colors.