Halter is a horse show class in which horses are judged on their conformation. Halter classes divide by breed, sex, and age categories.  The halter discipline has a wide range of rules. Namely, breed requirements, clipping patterns, grooming techniques, grooming materials used, and popularity. All classes, however, need horses to be well-groomed before entering the ring. They need to be schooled, stand correctly in the specified style and walk and trot on command.