A jerkin is a man's short close-fitting
jacket
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 ...
, made usually of light-coloured
leather, and often without
sleeves, worn over the
doublet
Doublet is a word derived from the Latin ''duplus'', "twofold, twice as much",