A sweater (North American English) or pullover, also called a jumper, 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, often over a shirt, blouse, T-shirt, or another 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. http://www.ugwool.com/sweater/