I used to wear the Merona Black Ultimate Crew Tee as an undershirt and I loved it. I bought several of them in the past because they were perfect. The company has since discontinued that shirt and no longer makes undershirts, probably leaving that market to Hanes, but Hanes doesn't seem to have anything like it.

So I tried out the Docker's Men's Performance Crew T-Shirt. It's pretty great. It's a bit more durable than the Merona, which seemed to last for about a year and a half of weekly use. The Dockers shirts are still looking and fitting as good as the first day I tried them about a year ago. I typically wear them under dress shirts at the office and they work quite well. My only negative is they can get a little warmer than what I'd like in the summer, but it's well within a tolerable comfort range.

I plan to buy more to cover a little over a week's worth of undershirts.