Yep...I'm a sanitor in a factory and its hot and steamy and by the end of the night im soaked.
I usually wear a thin shirt, then binder, then other shirt...underwear, shorts and then the coveralls, rubber apron, 2 pair of cloth heat resistant gloves, white glove sleeve things, rubber gloves, arm sleeves, knee high rubber boots, hair net, googles, hard hat, ear plugs, and untill recently beard net.
Its kinda of a pain because it limits my mobility and I have to do a lot lot of reaching cause everythings so high up....but whatev. I plan to buy the cotton concealor thing that has just chest binding that way I can wear and under shirt and that and be good to go.