The word jacket comes from the French word jaquette. A jacket is an upper body garment that usually extends below the hips. The jacket usually has sleeves and buttons on one front. The jacket is generally lighter, more compact and less insulated than the outer shell. Some jackets are fashionable, others are protective clothing. Sleeveless jackets are vests. There are many types of jackets. Biker jacket, denim jackets, hooded jacket, bomber jacket. The bomber jacket, also known as the flying jacket, is a durable short jacket with a front zipper, elastic or fitted waist and cuffs.