Originally Posted by Seattle Forrest

When I ran a 10k, I learned that you can't wear just any shirt, or your nipples will chafe horribly.

You turned me on to Craft baselayers, which are fantastic. But when I wear one long term, like hours on skis or a long hike, it can chafe my nipples too. It hurts!!

How does this stuff affect technical fabrics? It's a small area so I'm not worried about it being less breathable, I'm worried about whether I'll damage my shirts? Any thoughts?