A knit cap is a type of headwear, usually made of wool or acrylic, that covers the head and ears to provide warmth in cold weather. There are various other names for a knit cap, including beanie, toque, tuque, woolly hat, watch cap, skully, skullcap, and stocking cap. These different names come from different regions and countries, and some may also refer to slightly different types of headwear. However, they all generally refer to a warm, cozy hat that fits snugly on the head and keeps the ears covered in cold temperatures.