Dee Zee Bed Mats - Helps prevent cargo from shifting and damaging your truck bed and a necessity for every truck, even with a spray in bed liner. The custom fit application contours around wheel wells for complete coverage of the truck bed surface. The mat is constructed from highly compressed rubber compound to resist abrasions and tears. At a final thickness of 3/8 in. (9.52mm), the heavyweight mat will not lift from the bed surface even at high speeds. The rubber compound can withstand extreme temperatures, and it will not crack, rust or break. The non-porous surface will resist most chemical spills. Rubber cleats help keep mat in place and facilitate water drainage.