improperly can cause damage. Reining horses are usually fitted with special horseshoes on the hind feet called slide plates. Slide plates have wider bar steel and are smoother than regular horseshoes, with even the nail heads filed to be flush with the shoe. When the horse plants its hind feet for a sliding stop, the shoes allow the hind legs to slide along the ground with less resistance. Slide plates often have long trailers to help the horse's hind legs slide in a straight path as well as a rolled toe so that the front of the hoof does not accidentally catch the ground. Riders must wear a long-sleeved shirt, jeans, and cowboy boots. In most competitions, they also wear chaps. Gloves are optional. There has historically been less difference between men's and women's attire in reining than in most western events, though women's clothing is more influenced by fashion trends from Western pleasure competition, and thus women sometimes wear brighter colors, and are more apt to add a decorated jacket or vest, though usually not as flashy as in other horse show events. Wearing a certified equestrian helmet is permitted by some organizations, though not commonly used. Bit and Hackamore rules Horses in most types of reining competition are required to perform in a curb bit. In most cases, riders with a horse in a curb must give all rein commands with only one hand. Riders may use both hands when a horse is ridden with a snaffle bit or a bosal hackamore. However, snaffles and hackamores ridden with both hands are usually limited only to special classes for horses between the ages of three and five years old. Most of the time, with the exception of "freestyle" classes, snaffle bit and hackamore horses do not compete directly against curb bit horses, though specific details vary depending on the particular sanctioning organization. In the last thirty years, the snaffle bit is the more common headgear used on younger horses, but in the past, the hackamore was more common. Some local or regional competitions offer a non-sanctioned "novice horse" division where horses of any age who have limited experience as reining horses can be ridden two-handed in a snaffle. Sometimes reining classes at breed shows are split into "junior horse" and "senior horse" divisions. Depending on the breed, Junior horses are either 3, 4 or 5 years old, and allowed