Here's what other sites are saying:
These 3/4-length, orthotic insoles are designed for those who require significant arch support while reducing the shock of everyday activities. Made from the same materials used in many custom orthotic insoles, they are strong yet lightweight and flexible. Graphite-molded arch support provides flexible support and prevents excess movement of the foot. Made of shock-absorbing Poron(R) antifungal foam that also wicks moisture away from your feet. ETC(R) liner reduces friction between your sock and the insole, resulting in cooler feet. Both insoles and packaging are PVC-free. Closeout.