When I was a newbie, I wore a full coervage underwire cotton bra. I ended up with a bloody abrasion in my cleavage from the ends of the wires, resulting in a scar. I've also worn regular sports bras, resulting in nipple chafing. Ouch! It felt like I was breastfeeding all over again. Now that I have learned my lesson, I wear nothing but Moving Comfort bras. No issues since