These shirts are about as basic as it gets...that's why i bought them. If you own or have owned those v-necks from the Analog 3-pack, these are a step above that. Nice and thin. Soft handle. Good length in the sleeves so you don't feel like you're wearing an undershirt. V isn't too deep, it's just right.
I'm 6' about 160lbs and I bought them in large.