This is the Goldilocks zone. A 180 GSM ring-spun cotton tee gives you enough body to feel substantial, but it's still breathable enough for a 95-degree afternoon. It's the sweet spot for most people who wear a tee daily, whether you're running errands or sitting in an office with aggressive AC.

The one-line takeaway: If you only check one thing on the label, make it GSM—and look for 170–190 for Texas.