A premium headcollar designed by Dr. Roger Mugford, the Halti OptiFit Headcollar provides an optimum fit and guarantees to stop your dog from pulling. Its unique design works by gently directing the dog's head, steering him into desired positions just like a horse. With a self-adjusting chin strap and unique, reflective cheek straps which follow the contours of your dog's face, it doesn't rise into your dog's eyes or slide down to his lips. Designed to fit dogs that other headcollars don't, from short-nosed boxers to long-nosed greyhounds, it will provide maximum comfort and optimum fit no matter what shape or size. The pack includes the headcollar, a comprehensive training DVD and guide, and a safety link which connects to the dog's collar for extra security. Available in Black. Size Guide Available in Small (24 - 40cm), Medium (42 - 54cm), or Large (48 - 64cm). Check out our Halti OptiFit Headcollar Size Guide for more .