Dupont Large Yellow Tychem Qc Chemical Protection Coveralls Dupont Large Yellow Tychem Qc Chemical Protection Coveralls With Serged Seams, Front Zipper Closure, Attached Hood, Attached Sock Boots It Is Reliable Protection For Minor Chemical Spills and Where There Is Potential For Mist Or Light Splash Applications: Used Extensively In The Petroleum, Pulp and Paper, Food and Chemical Processing and Pharmaceutical Industries