Abstract: A convertible jacket comprising a sleeveless body garment in the general form of a vest and an upper component comprising, as a unit, two sleeve portions connected by a yoke portion incorporating a neckhole and, optionally, a neckhole extension such as a collar or hood. The yoke portion of the upper component is so configured as to substantially cover the upper back and shoulder area of the body.The upper component, when combined with the vest, forms a selectively convertible jacket providing a second layer of construction upon the upper back and shoulders, minimum restriction of arm and shoulder movement and positive body ventilation. The upper component can be readily oriented to and attached to the vest by fastener means and can be readily detached and removed from the vest. Such attachment or removal may be effected without regard to whether the vest is being worn.