Epaulet sells these fantastic quality jersey shirts that are ideal for this time of year for layering, etc.
Unfortunately, I got the sizing wrong on these and they fit a bit snug on me.
From their website:
8oz Union Jersey is a thick, sturdy fabric that emulates the heavyweight athletic tees the 1950's. Composed of long-staple, 100% pima cotton fibers, the yarn is ring-spun and continually twisted into a system of fine ropes. This twisting results in a stronger yarn...