Mesh at center back and under arms. Modified raglan sleeves with thumbholes for warmth. Slight drop tail hem. Reflective taping at zipper and back panel. 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. Body: 5.6-ounce, 88% Poly/12% Spandex jersey. Mesh Panels: 92% Poly/8% Spandex.