Superior Manufacturing NoTrax Diamond Sof-Tred Black 1/2" thick Safety/Anti-Fatigue Floor Mat measuring 3' X 4' features a non-directional diamond deck plate top surface that allows for sure footing. Mat has Dyna-Shield? PVC sponge that is manufactured with a tough protective top layer with the sponge mat underlayment that offers comfort, long lasting wear and excellent tear resistance with tensile strength. It has beveled foam with 4 sealed sides to limit tripping hazards and resist moisture penetration and finds application in packaging stations, lab areas, QC areas, shipping departments and other medium-duty dry work areas.