A sock is a piece of clothing worn on the foot, typically made from materials like cotton, wool, or synthetic fibers. Socks come in various lengths, including ankle, crew, and knee-high, and they serve to provide warmth, comfort, and protection to the feet. They can also help absorb moisture and reduce friction between the foot and shoe. Socks are often designed with different patterns, colors, and styles, making them a popular fashion accessory. They can be worn for various occasions, from casual outings to formal events. Some socks are specifically designed for sports, providing additional support and cushioning during physical activities.