If you've ever picked up two black tees that look identical but feel completely different, GSM is the reason. GSM stands for grams per square meter—basically, how much the fabric weighs per square meter of cloth. A 150 GSM tee is light and drapey, great for layering or scorching days. A 200 GSM tee is heavy, stiff, and built to last decades. Windbar's 180 GSM sits right in the middle, which is why it's a favorite for minimalists who want one tee that does everything.

For Georgia specifically, the humidity is the enemy of heavy fabrics. A 200 GSM tee might feel like a sauna in August. A 150 GSM tee might feel too flimsy for cooler evenings. 180 GSM gives you that sweet spot: it breathes well, resists wrinkles, and holds its shape after multiple washes.