STAY-COOL WICKINGODOR CONTROLZONED VENTILATIONSTRETCHFLATLOCK SEAMS FOR COMFORTREFLECTIVE DETAILS 5.6-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 OGIO ENDURANCE Nexus 1/4-Zip Pullover - Mono Reflective