Open footwear is a type of shoe that does not fully cover the foot. The most common type of open footwear is SANDALS, which are shoes with straps or bands that go around the foot and hold it in place. SANDALS can be made from a variety of materials, including leather, rubber, and synthetic materials. They are often worn in warm weather and for casual occasions. Another type of open footwear is flip-flops, which are similar to SANDALS but have a flat sole and a thong between the toes. Flip-flops are usually made from rubber or plastic and are often worn at the beach or pool.