92% POLYESTER / 8% ELASTANE. SOFT FABRIC WITH MESH VENTILATION IS EXTREMELY BREATHABLE & LIGHTWEIGHT. 4-WAY STRETCH. COVERED ZIPPER PLACKET WITH STRIPE RIB TRIM DETAIL ON BACK COLLAR. MATERIAL WICKS SWEAT & DRIES REALLY FAST. ANTI-ODOR TECHNOLOGY PREVENTS THE GROWTH OF ODOR-CAUSING MICROBES. UA LOGO BACK YOKE.