An item of footwear is an article of clothing worn on the feet. Common items of footwear include boots, shoes, sandals, and socks. Boots are typically made of leather or rubber and cover the foot and ankle. Shoes are similar to boots but usually have a lower profile and are made of a variety of materials. Sandals are open-toed shoes that are held in place by straps. Socks are thin garments that cover the foot and are usually made of cotton or wool.