Zytron® 500 is the classic emergency responder choice for hazmat response and other demanding situations. It's tough, built for mobility, and based on patented technology that created the first material to survive eight full hours against the ASTM F1001 Test Battery with no breakthrough. Now with an extensive chemicals-tested list numbering in the hundreds, it's no wonder that responders around the world trust Z500 garments for ultra-demanding Level A and Level B applications.