Even people who've been wearing tees for years make a few classic mistakes. The biggest one? Hanging wet tees by the collar. The weight of the water stretches the neck as it dries. Always lay flat or hang by the hem.

Another mistake is using fabric softener. It coats the fibers and reduces their ability to grip each other, which can make the neckband loosen faster. Skip it, or use a vinegar rinse if you need to soften.

And here's a subtle one: how you take the shirt off. Most of us grab the collar and pull. That's exactly the wrong move. Instead, cross your arms, grab the hem, and pull the shirt up and over your head. It's a small change that makes a big difference.