I've had the WS-T02 — a pocket tee like no other I've owned — for more than three years. It's among the best T-shirts for men I own, and still looks brand-new after tons of hard-wearing.
The trim cut is form-fitting and long enough to tuck, while the V-neck ... but they're still essentially just T-shirts. If they're styled right, there's no reason you can't pop on an "undershirt ...