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The Best Running Underwear to Beat Burn on Your Bits (2025)


Why should you trust me about chafing? Well, I once ran the equivalent of 67 marathons in 67 days with a 25 pound backpack. This is my toolkit for anyone trying to avoid pain.

Lube up: Anti-chafing products like petroleum jelly or specialized balms are your best anti-chafe defense. Even if your carefully chosen fabrics let you down, generous coats of lube can save the day. You can’t afford to be shy. Especially downstairs. You want to make sure you get to the places you rarely go.

Go Seamless: Choose shorts, leggings, basic shorts, tees and running underwear that are either seamless or have flat-lock seams. I always check the seams of built-in twin shorts and rarely trust the built-in inner-briefs in regular shorts. When in doubt, stick with your trusty slips.

Tighten: Choose tighter, body-hugging layers over loose fit gear. It seems counter-intuitive, but fabric that stays in one place, close to the skin works better than fabrics that move more.

Avoid cotton: Cotton is heavy and can be abrasive even when dry. When you’re drenched in salty sweat, it’s a disaster for your sweet bits. Those layers that touch your skin should be made of synthetic fabrics or wool. These dry faster and reduce friction.

Powder your toes: Blisters are essentially nuclear abrasions and can be more difficult to avoid. Powdering my feet and socks can help reduce the moisture that increases the risk of rashes and hotspots.



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