A close-fitting cap is a type of headwear that fits snugly around the head. Common examples include beanies, calots, coifs, and deerstalkers. Beanies are typically made of wool or cotton and have a brimless, round shape. Calots are similar to beanies but have a more pointed top. Coifs are a type of close-fitting cap that is usually made of linen and has a flat top. Deerstalkers are a type of hat with a brim and two peaks at the front, often associated with Sherlock Holmes.