Arch Plus 7-8.5. Sof Sole by Implus features the Arch Plus Insole designed as a protective replacement insole and overlay to deliver optimum comfort and performance. Manufactured using the IMPLUS Cellular Cushioning System, an open cell material developed to provide : superior shock absorption reducing foot pain and lower body fatigue, cushion energy to distribute pressure, a breathable surface with ETC fabric to promote a cooler, dryer surface. Fits most shoe sizes 7-8.5 and can be cut to fit. Directions and warranty information on the package.