The PetSafe Martingale Collar with Quick Snap Buckle is easy to put on and take off your dog. Martingale collars are safer than prong collars and are more comfortable for your dog to wear. This durable, nylon, martingale collar tightens when your dog pulls and loosens when he stops, so it's only tight when it needs to be. These collars give you greater control during walks while also reducing the risk of your dog slipping out of their collar. PetSafe brand is here to help you and your pet live happy together. Quick-Snap Buckle - Easily take this collar on and off of your dog Martingale Collar - Safer and more secure than prong collars, this collar tightens when your dog pulls and loosens when he stops pulling to help make sure that the collar is never too tight Safe and Secure - The Martingale collars have a secure fit to help prevent dogs from escaping or backing out of the collar Durable, Nylon Material - Long-lasting nylon material is comfortable for your dog to wear during walks Sizing - This collar comes in a variety of sizes and colors so you can find the best one that matches your pet's style 1 year limited warranty