A nice touch is the blue drawstring on the hoodie version.
Gildan Mens G500 Heavy Cotton Plain Solid Short Sleeve Casual Blank T-Shirt
With a crew neck, you get a straightforward look that works for daily wear.
ARMY SOLID OD GREEN OLIVE DRAB PLAIN MENS ROTHCO T-SHIRT S M L XL 2X 3X 4X
This one is made for men, so the shoulders and chest have a roomier cut.
Rothco Military Tactical Solid Color Long Sleeve T-Shirt (Sizes: Small-2XL)
A nice detail is the regular fit’s armholes, which allow full range of motion.
$80 Vince Men’s Red Solid Garment Dye Short-Sleeve Cotton Crew T-Shirt Size M
This T-Shirt has a comfortable sleeve length that hits above the elbow.