Tyvek® is a porous packaging material made of very fine and continuous filaments of virgin high-density polyethylene (HDPE). The unique structure of Tyvek® creates a tortuous path with substantial lateral movement, making it harder for bacterial spores and other contaminating microbes to get through. This tough filament web makes Tyvek® also highly durable yet breathable reducing the risk of package failure. Tyvek® packaging material is the trusted choice for all medical devices ranging from catheters to implantable devices.