Economical mat for aggressive chemical spills or unknown liquids. 100% polypropylene mat is chemically compatible with most liquids. Color-coded in cautionary yellow for quick identification. Use for spill cleanup in university and research labs, hospitals, chemical or pharmaceutical plants and other facilities that use hazardous liquids. One layer of SpunBond fabric is ultrasonically bonded to one layer of Meltblown sorbent. Perforated at 7.5" up the center.