Rebar(TM) base and mid layers offer athletic styling and performance technology, engineered for the guys who get the work done. Greater Arm Mobility seam construction for maximum range of motion. Stain-repellent finish protects against stains, dirt and other marks. Wind and water resistant garments employ a thin technological coating to block wind and protect from light rain. VentTEK(TM) technology features body mapping to enable air flow and regulate body temperature. Reinforced pockets. 5 oz durable cotton blend jersey. 60% cotton, 40% polyester.