A jerkin is a man's short close-fitting jacket, made usually of light-coloured leather, and often without sleeves, worn over the doublet in the 16th and 17th centuries. The term is also applied to a similar sleeveless garment worn by the British Army in the 20th century. A buff jerkin is an oiled oxhide jerkin, as worn by soldiers.

A jacket is a garment for the upper body, usually extending below the hips. A jacket typically has sleeves and fastens in the front or slightly on the side. A jacket is generally lighter, tighter-fitting, and less insulating than a coat, which is outerwear. Some jackets are fashionable, while others serve as protective clothing. Jackets without sleeves are vests.