Cost-effective initial replacement to custom-made orthoticsPatented multiple re-attachable orthotic arch supportsErgonomically designed by a doctor, using a patented combination of high-density dual layer 100% memory foam plus two re-attachable orthotic arch-supportsThe light-green flexible arch-support is recommended for medium/regular arch and the dark-green rigid arch-support is recommended for low arch/pronation supportBased on foot-type, footwear and activity, MultiThotic™ provides adaptable comfort and shock absorption while allowing one to vary the degree of heel, arch-support, and motion-controlMade with medical-grade polyplasticIdeal for stationary, mobile, and outdoor workersSilver ion anti-microbial technology in top clothAntibacterial, anti-perspiration, and anti-odourTemperature-regulating aeration holesMachine washableFits size 8 - 9 men's and size 9 - 10 women's shoes