When the heat is on, this shirt helps you keep cool by expertly managing moisture—wicking it away from your skin so you stay drier, longer. Odor-fighting properties help minimize odor. 3.8-ounce, 100% polyester, Tag-free label, Flat knit collar, 3-button placket, Dyed-to-match rubber buttons, Double-needle sleeves and hem, Side vents.