An active jacket is a mid-stomach–length garment for the upper body. 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.
A windbreaker is a thin coat designed to resist wind chill and light rain, a lighter version of a jacket. It is usually of light construction, and these days characteristically made of some type of synthetic material. They often incorporate elastic waistbands or armbands and zipper to allow it to be accommodated to the current weather conditions. Regular jackets, coats, and etc. may include a type of windbreaker as an interlining that can be removed when desired. Windbreakers sometimes include a hood, that may be removable. Many windbreakers may also include large pockets on the inside or the outside which allows belongings to be covered from weather such as light wind or rain as mentioned above. Windbreakers are commonly worn in the summer season when the temperature is warm, but wind is still apparent. Brightly colored windbreakers may also be worn by runners as protection from the elements, and as a reflective garment used for safety.