Gravity Defyer Peony Slide Sandals Patented VersoShock technology in the heel uses a system of air and springs to help reduce the impact of walking on hard surfaces. VersoShock heel technology also helps propel your feet forward for an easier walk. Polyurethane midsole supports your foot for added comfort. Hook-and-loop straps at the instep and forefoot allow you to customize the fit. Foam-padded polyurethane footbed cushions your steps.