Arch Support generally refers to the part of the insole of the shoe that raises right at the level of the arch to provide support to the midfoot. Arch Support also refers to individual insole cups with a molded shape that fit the arch and are placed inside the shoe to help relieve foot or heel pain.
About Sandals:
An open type of shoe that consists of a sole fastened by straps to the foot. Types of sandals include espadrilles, flip-flops, strappy sandals, and thong sandals.