A sweater, also called a jumper in British English, is a piece of clothing, typically with long sleeves, made of knitted or crocheted material that covers the upper part of the body. When sleeveless, the garment is often called a slipover or sweater vest. Sweaters are worn by adults and children of all genders, often over a shirt, blouse, T-shirt, or other top, but sometimes next to the skin. Sweaters were traditionally made from wool but can now be made of cotton, synthetic fibers, or any combination of these.