Fabric weight doesn't just affect how the tee feels—it changes how it fits. A heavyweight tee has more structure, so the oversized cut drapes cleanly over your chest and shoulders. It reads as 'deliberately relaxed.' A lightweight tee, on the other hand, is more likely to cling, which ruins the whole effect.

If you're layering—say, over a long-sleeve or under a jacket—heavier is better. It doesn't bunch up as much, and it holds its shape throughout the day. If you're wearing it alone in hot weather, a mid-weight (around 160–180 GSM) is a nice middle ground: it hangs well but doesn't feel like a blanket.