It may look like a garden-variety flip-flop, but the Vionic with Orthaheel Technology Ryder sandal will keep you on the move and in comfort for hours on end. Podiatrist-designed to alleviate a number of common foot ailments, this men"s slip-on sandal has a jersey-lined synthetic leather upper, nylon webbing toe post and hook-and-loop strap to personalize the fit. With textured dots to improve underfoot grip, the Dr. Andrew Weil-recommended biomechanical orthotic footbed features arch support and a deep heel cup to cradle your sole with every step; Tri-Planar Motion Control reduces pronation, restoring the foot to its natural position for greater comfort and proper alignment when walking or standing; the 1st Ray Flexor ZoneTM improves big toe function. The APMA-accepted Vionic with Orthaheel Technology Ryder thong sandal has a rubber sole with a wave-patterned tread to keep footing secure. Fit tips: This style is offered in whole sizes only. If you normally wear a half size, we recommend ordering up: For example, if you are a 9.5, order a size 10.