It is the highest level of competition for Saddle seat Equitation riders. Gaits shown in Saddle Seat classes include the walk, trot, and canter. Kentucky Jodhpurs are full-length riding pants designed exclusively for Saddle seat riding. High action is prized in the saddle seat horse. The English riding classes fall into two primary styles, hunt seat and saddle seat. This is the premier event of the year for Saddle seat Pleasure and Equitation. The configuration is superficially similar to the SkyRider "saddle seat" design proposed by Aviointeriors. The saddle seat was developed from two sources. Toe length and shoe weight therefore is an often controversial issue among saddle seat competitors. The National Show Horse is most often used for saddle seat riding. Equitation classes occur in the Hunt seat, Saddle seat, Dressage, and Western disciplines. The customary style for rider attire and tack is saddle seat. The Saddle Seat World Cup is an international competition held biannually. In saddle seat riding, contact is to be maintained equally on all four reins. Rules for horse grooming and handler attire parallel saddle seat rules.