When you’re breaking a good sweat, that sweat evaporates and produces a cooling effect. After skin temperature cools to a comfortable level, your body stops sweating. It’s a super-efficient process and one that an effective moisture-wicking fabric will complement.
Wicking fabrics are modern technical fabrics when properly integrated in apparel and clothing technology, it has been proven to draw moisture away from the body. Thanks to high-tech polyester, which, unlike cotton, absorbs very little water. Naturally, Cotton will absorb 7% of its weight in water, polyester only 0.4%.
Generally, you want moisture-wicking fabric on any apparel that touches your skin, like a long underwear base layer. You also want it on clothes you plan to wear while you’re doing aerobic (sweat-producing) activities like hiking or running.