A type of sweater is a garment that is typically worn for warmth and comfort. There are four main types of sweaters: KNIT, CARDIGAN, turtleneck, and pullon. KNIT sweaters are made from interlocking loops of yarn and are usually lightweight and stretchy. Cardigans are open-front sweaters that are usually buttoned or zipped up. Turtlenecks are sweaters with a high collar that wraps around the neck. Pullons are sweaters that are designed to be pulled on over the head without buttons or zippers.