Sandal is an open shoe. It leaves the foot largely uncovered and therefore allows an excellent air exchange avoiding sweating of the feet. The sandal is considered an open shoe, even if only on the toe or heel. The sandals are made of a sole and laces or strips that keep them around the foot. The sole can be of different materials: leather, rubber, woven fibers such as straw or raffia, plastic materials. Laces are shaped pieces or strips of fabric, leather, fibers, rubber or plastic; wrap around the top of the foot and the back of the ankle. The flip-flop sandals are held in place by a lace that passes between the big toe and the second toe and divides, going to reattach itself to the sole on its sides, forming a sort of Y. The closure can be obtained with the knotting laces or with more technological means such as Velcro, buckles, buttons and snaps. The feminine sandals can be equipped with a very high heel and plateau, with flashy colors and applied decorations; from practical footwear they become fashion accessories.