Material: As all styles in the swim category, the best board shorts are water-repellant. Go-to fabrics include nylon and ...

Made with breathable polyester mesh, these shorts keep you cool on the hottest days. They have a dedicated key pocket as well as a slight split, which allows for ample movement when you run.

Despite its lightness, polyester is actually a pretty great insulator, which is why many brands use it in cold-weather workout clothes in addition to tanks, tees and shorts.

Asudesire Mesh Athletic Shorts, $27 (was $50) ... These athletic shorts are 95% polyester, ... They're composed of a cozy fabric that doesn't hold moisture, ...

Running shorts with sweat-wicking fabric are the way to go. The material is usually a blend of polyester, spandex, or nylon that lifts moisture from the skin while being flexible during movement.