T-shirts are a weird one. Hanes Beefy T are the highest price I'd ever spend on a t-shirt, but I only wear them going somewhere informal- Hanes keep their shape for ages and so don't have that unfortunate look when t-shirts start to become amorphous (although I cannot think of an occasion where I'd consider a t-shirt - no matter its cost or shape - smart wear). I have linen shirts or short-sleeve collared shirts in hotter weather and heavier, buttoned cotton shirts in colder temperatures. As a kid and a student, though, I practically lived in t-shirts; I don't find them practical in extremes of weather now.