A jacket is a clothing piece made to cover the top of the body with a front opening. In most cases, it is long-sleeved. According to its weight, it can protect from the cold. During the winter season, a coat can be worn over it. Jackets can be found for many activities: for sports, for the city, to rie a bike or for some formal occasions, and it is made of diverse materials: nylon, wool, cotton, leather jacket, etc.