A bit random, but all the p-coat talk made me think of it. I have a US Military surplus t-shirt that's given me over 10 years of usage. I think it's 100% cotton (tag has worn away) but it might be the 50/50 kind, and it's just amazing: slim fit, breathes nicely, never has stained, and it's just about indestructable. They make them in black, olive, and brown. I can't recommend them highly enough. Anyone else wear them?