Looking for a long tee to layer

I've found one (and it's less than $20 and comes in the most basic colors: white, black, gray). I'm constantly on the hunt for t-shirts and it's nice to have a few in different lengths and ones that are ideal for layering. T-shirts are a staple in my wardrobe and when I find a good one I hold onto it.

I have yet to try Everlane's t-shirts, but I've heard good things. Have you tried them?

I'm curious, where you get your t-shirts?