DuPont® Tychem® 2000 QC125BYLLG00 Large Yellow 10 mil Disposable Chemical Protective Coveralls With Elastic Wrists And Ankles. A lightweight, and durable fabric, Tychem® 2000 fabric provides at least 30 minutes of protection against >40 chemical challenges. Tychem® 2000 is used for light splash protection in a variety of industrial environments, including petroleum refining, pulp and paper manufacturing, food processing, chemical processing, and pharmaceutical manufacturing.