So I have my first attempt coming up in mid-August (day hike), and as a longtime runner who knows that I need nipple guards for anything over 8 miles of running, I'm curious if anyone has problems with nipple chafing during 12-plus hours of hiking?
I'm guessing no just envisioning what causes nipple chafing (and I haven't had issues in 5-6 hour hikes). But I have the nip guards ready if so!

Anyone experience chafing anywhere else?