In this time of uncertainty (you never know when you might get another Alex Wang tee again), it’s comforting to know there are some things that never go out of style, or stock. Like a perfect white tank top, one that you can layer or wear on its own — which, given many designers’ propensity for sheerness, isn’t as easy as it sounds. But J.Crew got the message when they created the very aptly named perfect-fit tank. Supersoft cotton, ultrafine rib, it is just the answer for those high-waisted shorts, those spaghetti-strap dresses, and just about every other wardrobe conundrum you can think of. And if you tire of white, it comes, of course, in a zillion perfect colors.

$18 at JCrew.com.