>>1290035t. never worn an undershirt
because they hug your skin tightly, and are made from wicking materials, undershirts evaporate your sweat more rapidly than your billowy polyester dress shirt, rather than letting the sweat pool in your armpits and then glob off onto your outer shirt. this cools your skin faster than not wearing an undershirt, which might seem counterintuitive if you're a gross slob who never wears them
the other thing that your dad never taught you was that you should get them in a color that matches your skin so that you don't look rapey with a v-neck shape under your dress shirt
