heavy duty Ground protection mats 15mm thick for nstruction . red UHMW temporary roadway mats for heavy duty 15mm XL [] IN STOCK! - 4x8 Black Mats. Our ground protection mats made from 100% recycled high-density polyethylene (HDPE), can hold up to 100 tons and are tough enough to not break. Mats have cleats and textured tops to aid with helping