Seven millimeters of solid PE is what stands between a garage slab and everything that drips onto it. These four black mats each measure 7.7 ft by 3.8 ft and lay side by side to cover 15.5 ft by 7.7 ft, catching wastewater, mud and oil before it stains concrete. The raised 3D diamond pattern gives tires and boots something to bite on and stiffens the sheet so it resists curling at the edges. Sound and impact are absorbed rather than echoed, which is noticeable when tools land on the floor. Cleaning takes a rag, a mop, a vacuum or a cleanser, and the surface shrugs off the harshest spills. Net weight for all four rolls is 13.5 lbs, so they also suit a tool room, an equipment room or a cargo container.