For me it depends on what I'm carrying if I use leather or "Plastic".
My Glocks are carried in a CompTac CTAC and everything else is carried in leather. I find leather to be more comfortable for day to day carry.
The benefit to "Plastic" is it last forever. I too am in a sweat intensive environment. With a T-Shirt between my skin and the holster I haven't had a problem.
Biker
