- The HALTI OptiFit is a complete training program designed by Dr Roger Mugford which guarantees to stop your dog pulling.|$|- The pack includes: HALTI OptiFit headcollar, a comprehensive training DVD, written guide and a HALTI safety link which connects to the dogs collar for extra security.|$|- Specially designed to provide an ergonomic and comfortable fit the adjustable chin-strap with secure camlock allows a customized fitting for every dog.|$|- Size:Large.|$|- Gender: Unisex Adult