Worth The Splurge: According to Jerker, there's really nothing quite like a 100 percent cotton tee. "It looks great, feels so comfortable on the skin and lasts almost a lifetime." If that's not an option, a blend can work just as well. Still, because it's so breathable, it's important to have at least some natural material in your undershirt.
Quality Check: Always go for the softest possible style. That means there's a higher thread count, and that it will last longer (and be more comfortable, of course!). You'll find some great options in Goldstein's QVC line, LOGO.
Care Secrets: So long as the item's been pre-shrunk, you should be fine with any wash setting. And don't stress if it starts to stretch out a bit! "I love stretched-out, worn-in tee shirts," Goldstein told me. "I think we have to stop thinking of clothes being so precious!"
The Downside: It absorbs moisture very quickly, including all your sweat. You need to wash cotton constantly during the summer!