A great T-shirt is supposed to be effortless. It’s the one piece in your wardrobe you reach for on busy mornings, casual days out, or when comfort is the only dress code that matters. But there’s one small issue that can quietly ruin the clean look of a T-shirt outfit: visible bra lines.

We spend a small fortune on fancy face serums and 10-step skincare routines, but we often completely ignore the skin that spends 12 hours a day trapped under underwire and elastic. Between "boob sweat" and the general buildup of oils, your bra can become a bit of a science experiment if you aren't careful.