Pads provide the utmost in patient comfort and cushioning. Covers are heavy vinyl, with heat-sealed edges to prevent contamination. Heat-seal is also stronger than sewn edge. Pressure zipper makes opening and closing cover simpler and will not mar surface of examination table. Frosted/Clear 8 mil. Covers resist staining! (When pad and cover are purchased at the same time, the pad will be encased and heat sealed inside the cover. When the cover is purchased separately it will be supplied with a plastic pressure zipper.) Custom imaging table pads are available. Please contact customer service at 1-800-321-6964. Please note: custom imaging table pads are made-to-order and are non-returnable.