Most jackets have a variety of inner pockets, and two main outer pockets, which are generally either patch pockets, flap pockets, or jetted pockets. 
The patch pocket is, with its single extra piece of cloth sewn directly onto the front of the jacket, a sporting option, sometimes seen on summer linen suits, or other informal styles.
The jetted flap pocket is standard for hip pockets, with a small strip of fabric taping the top and bottom of the slit for the pocket. It has a lined flap of matching fabric covering the top of the pocket, sewn in along the seam of the jetting. This flap was initially created to protect the contents of the pocket from any rain, and is therefore traditionally meant to be tucked in when indoors, leaving the jettings exposed for show. However, because this fact is now often ignored and the flap is seen as an accessory that completes the style, it is commonly left out indoors, even during formal events.
In addition to the standard two outer pockets, some suits have a third, the ticket pocket, usually located just above the right pocket and roughly half as wide. While this was originally exclusively a feature of country suits, used for conveniently storing a train ticket, it is now seen on some town suits. Another country feature also worn sometimes in cities is a pair of hacking pockets, which are similar to normal ones, but slanted; this was originally designed to make the pockets easier to open on horseback while hacking, also called pleasure riding.
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