When the heat is on this shirt helps you keep cool by expertly managing moisturewicking it away from your skin so you stay drier longer. Odor-fighting properties help minimize odor. 3.8-ounce 100% polyesterTag-free label Flat knit collar 3-button placket Dyed-to-match rubber buttons Double-needle sleeves and hem Side vents*Due to the nature of 100% polyester performance fabrics special care must be taken throughout the screen printing process.