STAY-COOL WICKINGODOR CONTROLZONED VENTILATIONSTRETCHFLATLOCK SEAMS FOR COMFORTREFLECTIVE DETAILS5.6-ounce 88/12 poly/spandex jersey body 4.1-ounce 92/8 poly/spandex mesh panels Reflective taping at zipper and back panel Mesh at center back and under arms Reflective O heat transfer at back neck Reflective stacked O heat transfers at back and sleeves OGIO Endurance heat transfer label for tag-free comfort Modified raglan sleeves with thumbholes for warmth Slight drop tail hem Reflective O Endurance heat transfer at right hem.