Organic Cotton Boatneck Unishort
I am happy with the purchase!
I am 5'8'', 130lbs. I ordered the Large and glad I did! The fabric is nice and sturdy and not too stretchy which keeps everything in place but leaves little wiggle room- so order a size up.
My only modification would be to allow more room under the arm area. The arm holes are a bit snug and rub which creates smudging from my deodorant.