Let's get straight to it — here's what actually matters on this one.

• Linen tops the list for airflow — its loose, uneven weave lets air pass through more than any common menswear fabric.
• Pure cotton (especially lightweight poplin, under 130 GSM) is the next best everyday option, absorbing sweat rather than trapping it against skin.
• Technical moisture-wicking synthetics (used in athletic wear) pull sweat to the surface to evaporate fast, but can feel clammy the moment airflow stops.
• Avoid tightly woven polyester-heavy blends for hot weather — they're the most likely to trap heat and cause visible sweat patches.

The fit-and-fabric-health takeaway: Breathable fabric only helps if the fit allows airflow too — a snug breathable shirt performs worse than a slightly looser one.

Next up: check out our guide on cotton vs synthetic for sensitive skin.