Leather jacket is an armor piece in The Witcher 2: Assassins of Kings. There are two leather jacket variations in the game. This first one is common default starting equipment and a craftable item. It can also later be purchased in Chapter II, from Mael.
This second "leather jacket" can be looted during Chapter I. It is also Magical, unlike the first jacket. In other language versions of the game, it is differentiated from the one above: