"Go with the flow in the sporty Vionic with Orthaheel Technology Wave II Toe Post sandal, destined to become your favorite flip-flop. Recommended by Dr. Andrew Weil and podiatrist-designed to alleviate the pain and discomfort associated with a number of common foot ailments, this men's or women's flip-flop sandal has a soft, lightly padded jersey lining and quick-dry, mesh webbing upper accented with topstitching. With textured dots to enhance grip, the built-in biomechanical orthotic footbed features arch support and a deep heel cup to cradle the foot; 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 Zone aids big toe function. The APMA-recognized Vionic with Orthaheel Technology Wave II Toe Post sandal is finished with a rubber sole that features a wave-patterned tread for dependable traction on wet surfaces. Fit tips: If you are a man who normally wears a half size, we recommend ordering up: For example, if you are a 9.5, order a size 10. Because this unisex sandal is offered in men's whole sizes only, for women who wear whole or half sizes we recommend ordering down: For example, if you normally wear an 8 or 8.5, order a size 7."