STRIVE Womens Lady's Back Pain Relieving Slip On Flats Hampton Size 9 Blue These are the slip-on flats with biomechanical footbeds that help relieve back pain. Podiatrist-designed orthotic footbed that mimics the three-dimensional contours of the foot. Aided by wide deep heel cups, metatarsal dome, and contoured arch, the footbed helps improve posture. With suede/mesh uppers and polyurethane soles.