Orthaheel Mens/Womens Wave Sandals (Mens 13 Womens 14, Khaki) Synthetic Synthetic sole Convenient- pain-free "natural healing" solution to many of the common aches and pains associated with poor lower limb alignment. Orthaheel technology is clinically proven to reduce excess pronation- a contributing factor to "flat feet." Podiatrist-designed- biomechanical Tri-planar Motion Control footbed with a deep heel cup helps stabilize- support and realign the feet back to their natural position. Lightweight- flexible medium-density EVA midsole absorbs shock- reducing stress on feet- ankles and knees. Soft woven toe post and foam-lined strap ensure a comfortable fit.