The T-shirt bra is the perfect year-round underpinning that keeps everything in place while simultaneously ensuring that nothing looks out of place. The ideal version of this bra has minimal to no hardware or frippery for thin fabric to catch on, shows no trace of itself underneath clothing, and, like the T-shirt, is comfy-casual. We know that there are about 80 million different types of boobs out there — our friends at ThirdLove offer a whopping 78 sizes for all these ta-tas and show no signs of stopping — so we’ve done our homework to suss out the best of this style for many a breast type.