This document discusses different types of winter wear including sweatshirts, sweaters, and thermals. It defines a sweatshirt as a long-sleeved, collarless pullover made of heavy cotton or soft, absorbent fabric, worn for warmth or to induce sweating during exercise. Sweaters are knit garments that cover the torso and arms, made traditionally of wool but now also of cotton and synthetics, and worn over or next to other tops. Thermals are undergarments designed to retain body heat under other winter clothing.