The HALTI OptiFit is a complete training program designed by Dr. Roger Mugford which guarantees to stop your dog pulling. The pack includes a HALTI OptiFit Headcollar a comprehensive Instruction Guide and a HALTI safety link which connects to the dogs? collar for extra security. Specially designed to provide an ergonomic and comfortable fit the adjustable chin-strap with secure camlock allows a customized fitting for every dog. The uniquely styled cheek straps which follow the contours of a dogs face stop the OptiFit rising into the dogs eyes or sliding down to his lips (flews). Additional padding on the noseband ensures extra comfort and reflective webbing on the side strips help provide additional visibility. Designed to fit most dogs from short nosed Boxers to long nosed Borzoi s the HALTI OptiFit provides maximum comfort and optimum fit no matter what the shape or size.