1. Polyester

• Strength: A synthetic fabric with strong moisture-wicking abilities—it pulls sweat away from the skin, ideal for physical activity.
• Weakness: Poor breathability; it traps heat near the body, making it less comfortable for all-day wear in heat.

2. Cotton

• Strength: A natural fiber with excellent breathability—air flows freely to regulate body temperature. It’s highly absorbent, keeping you cool in hot, humid (or dry) casual settings.
• Weakness: Holds moisture once soaked (e.g., from heavy sweat), becoming heavy and clingy, so it’s less ideal for high-intensity activity.

3. Polyester-Cotton Blends: A Compromise

Verdict

• Casual hot-weather wear: Cotton is cooler, thanks to better breathability.
• Physical activity: Polyester works better for managing sweat.
• Balance: Polyester-cotton blends offer comfort, practicality, and moisture control for mixed needs.