Perfect for Houdini-Hounds, martingale dog collars do not unbuckle and stay securely in place without causing harsh strain or irritation. Our martingale collars are not made using any chains so you're sure to keep that fun and playful look but still offer the highest protection for your dog. When used correctly, martingale collars protect your pup and works to keep up with their playful energy with a 100% poly-pro thick webbing and reinforced lining. Together, the two high-quality built-in security features offer long-lasting durability for even the most active pets all in an adorable doggie-design to suit pup's personality!