The Shear Smart® Pad combined with the breathable double layer SHEAR SMART cover significantly reduces the effects of shear while providing superb user comfort. The cube construction of the pad surface allows air circulation, provides cushioning from mild impact, heat dissipation and the comfort of sitting on 9/16" of Akton® polymer. This pad will conform to contoured bases for additional support as required. The SHEAR SMART Cover is sold with the SHEAR SMART Pad. Replacement covers are available..