A donkey jacket is a medium-length workwear jacket, typically made of unlined black or dark blue thick Melton woollen fabric, with the shoulders back and front reinforced and protected from rain with leather or PVC panels.

Originating in the United Kingdom, the garment is untailored at the waist such that it hangs down straight from the shoulders. The front vertical edges fall straight and are squared-off at the bottom edge which is also straight horizontally with no vent at the back. In length it reaches 3 or 4 inches (8 or 10 cm) below the crotch area. It has no lapels and is closed by four to five buttons at the front that fasten tightly up to the neck with a broad and stiff turn-up collar, allowing the wearer to protect the neck from wind, cold and wet weather. It is thus well suited to outdoors work in demanding conditions.