A cardigan or pullover is a type of SWEATER that is typically made from wool, cotton, or synthetic fibers. It is usually worn over the top of other clothing and can be either buttoned or zipped up. Cardigans are usually open in the front and have long sleeves, while pullovers are usually closed in the front and have short sleeves. Both styles of sweaters are popular for their warmth and comfort, and can be found in a variety of colors and patterns.