I see people make one big mistake with oversized tees: they think the fit alone will keep them cool. It won't if the fabric is heavy. A thick, heavyweight cotton tee in an oversized cut is like wearing a blanket. You'll be hotter, not cooler.

What actually matters is the fabric weight. Look for something light—maybe a ring-spun cotton or a cotton blend that's designed for breathability. The fit just changes how much air gets to your skin, but the fabric controls how quickly moisture evaporates.

Another thing: oversized tees can look great on the hanger, but they can also look like you're drowning in fabric if the cut isn't right. The shoulder seam should still sit near your shoulder, even if the body is loose. If it's falling off your shoulder, it's too big.