I’m going to put it bluntly: most underwear sucks for running, and so do most (but not all ) two-in-one shorts. The bad ones bunch, snag, chafe, overheat, or undersupport; all of which make for a horrid running experience. For most people, it’s better to go with a specially designed pair of underoos crafted specifically for athletic performance.

This type of underwear is made of snug, yet slightly compressive material that wicks moisture, helps regulate temperature, feels smooth on the skin, and minimizes bouncing. We kept these factors in mind when determining which boxers, briefs, and panties provide the best comfort and support to help you perform at your best—minus any chafing.

We tested picks from top brands like Tracksmith, Reebok, Runderwear, and many more, evaluating different styles of underwear that were seamless, moisture-wicking, discreet, and more to really get a sense of what the best options were for different types of runners.…