A garment made out of a fabric that is designed to pull moisture away from your body. These fabrics, especially as a base layer, reduce chafing, and keep you cooler in summer/warmer in winter (because the sweat isn't on your skin anymore). In a full on sweat, like lots of moisture coming off your body, the garment will be damp/wet, and you'll be sweaty too...but the garment won't be sticking to you like it is glued in place like cotton does. You can get inexpensive wicking tees at Dicks, Nike, UnderArmour, Reebok, Adidas....just a plain tee will work wonders.