Be comfortable all day in the Orthaheel Wave sandals. Textile upper in a biomechanical thong sandal style with textile thong post Podiatrist-designed, Tri-planar Motion Control footbed with arch support and deep heel cup stabilizes and realigns feet to their natural position Clinically proven to help relieve common causes of heel and knee pain APMA Seal of Acceptance EVA midsole For best fit, order one size down for half sizes