Check out the M-Tac 937 T-Shirt that is in stock right now at Military 1st... "The M-Tac 93/7 T-shirt is built to handle anything, and it won't lose its shape no matter how many times you wash it, so no saggy sleeves or stretched necklines.
Lightweight, elastic, and surprisingly tough, it works just as well on a weekend fishing trip as it does in the gym, on patrol, or simply out for a pint.