The Halti Headcollar Stops Dogs From Pulling Its Unique, Patented Design Works By Gently Steering The Head And Therefore Controlling The Dogas Direction Of Movement, Making Training Easy And Putting You Back In Control The Halti Headcollar Has Become The Worldas Favorite No-Pull Training Device It Combines Maximum Safety And Control With Unparalleled Fit And Comfort For Your Dog The Halti Headcollar Was Invented In 1979 By World-Renowned Animal Behaviorist And Activist, Dr Roger Mugford, And Is Approved And Recommended By Vets, Trainers, And Canine Professionals Worldwide The Soft Material And Careful Design And Construction Ensure That The Halti Headcollar Is Comfortable And In Many Dogs Can Create A Pronounced Calming Effect The Halti Headcollar Makes Training And Behavior Modification Of Dogs Practical And Safe It Can Be Used In A Number Of Ways: Either As A Passive Means To Simply Stop Dogs From Pulling, Or As An Active Training Aid Millions Have Been Sold Worldwide The Halti Headcollar Comes In Six Sizes For Optimal Fit For All Breeds And Sizes