"Okay, so what GSM should I actually get?"

Let's break it down by your routine. If you're mostly indoors but still hit the pavement between car and office, a mid-weight tee around 170–180 GSM hits a sweet spot. It's substantial enough to look polished under a light jacket, but it won't cling to you when you step outside for lunch.

If you're a sweat-prone commuter—no shame, we've all been there—go lighter. 150 GSM is your friend. It breathes, it dries fast, and it doesn't feel like a wet blanket when the sun hits. Downside? It's thinner, so it might not hold its shape as well after many washes.

For the guy who runs cold or works in a freezing office, a 200+ GSM tee feels like a warm hug. It drapes nicely, hides imperfections, and lasts longer. But on a 90-degree day, you'll regret it.

So the follow-up answer is: match the GSM to your worst-case comfort moment, not your best.