broad panels but lightweight design, as well as comfortable for the rider over long hours of riding over challenging terrain. Police saddle, similar to an English saddle in general design, but with a tree that provides greater security to the rider and distributes a rider's weight over a greater area so that the horse is comfortable with a rider on its back for long hours. McClellan saddle, a specific American cavalry model that entered service just before the Civil War with the United States Army. It was designed with an English-type tree, but with a higher pommel and cantle. Also, the area upon which the rider sits was divided into two sections with a gap between the two panels. Pack saddle, similar to a cavalry saddle in the simplicity of its construction, but intended solely for the support of heavy bags or other objects being carried by the horse. Double seat saddles have two pairs of stirrups and two deep padded seats for use when double-banking or riding double with a child behind an adult rider. The western variety has one horn on the front of the saddle. Treeless saddle, available in both Western and English designs, but not built upon a solid saddle tree, intended to be flexible and comfortable on a variety of horses, but also not always able to provide the weight support of a solid tree. The use of an appropriate saddle pad is essential for treeless saddles. A flexible saddle uses a traditional tree, but the panels are not permanently attached to the finished saddle. These saddles use flexible panels (the part that sits along the horse's back) that are moveable and adjustable to provide a custom fit for the horse and allow for changes of placement as the horse's body develops. Bareback pad, usually a simple pad in the shape of an English-style saddle pad, made of cordura nylon or leather, padded with fleece, wool or synthetic foam, equipped with a girth. It is used as an alternative to bareback riding to provide padding for both horse and rider and to help keep the rider's clothing a bit cleaner. Depending on materials, bareback pads offer a bit more grip to the rider's seat and legs. However, though some bareback pads come with handles and even stirrups, without being attached to a saddle tree, these appendages are unsafe and pads with them should be avoided.