Halti OptiFit HeadcollarThe Halti Optifit is a versatile headcollar designed by Dr. Roger Mugford to provide an optimum fit and which guarantees to stop your dog pulling. Its unique design works by gently directing the dog's head, steering the dog from the front so the owner has full control. With a self adjusting chin strap and unique, reflective cheek straps which follow the contours of a dogs face, the Optifit doesnt rise into the dog's eyes or slide down to his lips