I get shirts from tshirtwholesaler.com, there may be a hyphen in there somewhere. My preferred t-shirt is next level 6210, fantastic shirt, soft, great fit. There's a couple other companies I like too.
Anyway, the whole point of this is I buy like a dozen or 20 shirts, they end up costing like 4 or 5 bucks a pop, max, and I wear them til they die. They're in various colors. Sometimes my wife will press some odd design onto them with her Cricut and whatnot.
I'm a big fan of band tshirts, but the majority I find are terrible quality shirts with sometimes just a generic logo. So I like to get creative with a shirt of my choosing.