A jacket is a waist length layering garment for the upper body. A jacket typically has sleeves, collar and fastens in the front or slightly on the side. A jacket is lighter, fitted, and less insulating than a coat.
Garments designed for excellent fit. Fitted garments tightly follow the part of the body being covered so they need to be of the correct size or shape. Tighter fit in the arms, waist, chest, waist and thighs.