Moisture-wicking fabrics are synthetic, designed to handle wetness better than traditional materials. Tiny spaces in knit or mesh materials allow moisture particles to move through the material in order to evaporate quickly. When you sweat wearing a moisture-wicking shirt, sweat moves to the outer layer of the garment, where it can evaporate rather than saturating the fabric. Since these synthetics handle moisture so well, they're perfect for exercise clothes.
These fabrics include: polyester, Gore-Tex, nylon and spandex. Double checking the tags on your tops, or reading about the materials it's made of will help you pick proper shirts for your workouts. And thankfully, you can find moisture-wicking materials in tanks, short sleeve tees, long sleeve tees and hoodies.