Yes, polyester underwear can be good for workouts, hot weather, and active use because it is lightweight, stretchy, durable, and quick-drying. It also holds its shape well and usually lasts longer than many natural fabrics.
In my experience, polyester works best when I need underwear that dries quickly during exercise, hiking, or travel. However, I do not consider it the best option for every situation. Some polyester underwear can trap heat, retain odors, and feel less breathable when worn for long periods.
For daily wear, I usually prefer cotton because it feels softer and more comfortable against my skin. People with sensitive skin may also find cotton or a breathable fabric blend more suitable.
My simple experience is this: polyester is useful for active days, but cotton is better for all-day comfort. That balance worked best for me.
