US Armed Forces physical training T-shirts

is it just me or are these the most comfortable t-shirts ever made? every single one that i've worn, whether it was an army, navy, or air force, fit perfectly. it's like the shirt adapts to your body shape without feeling like it's suffocating you. they also last quite a long time. the only drawback to wearing them is the inevitable question, "so when were you in the army?" i don't even know how these shirts became part of my wardrobe. they're definitely quality that i would pay for.