STAY-COOL WICKINGULTRABREATHABLEFLATLOCK SEAMS FOR COMFORTREFLECTIVE DETAILS Body: 4.4-ounce 100% poly jersey with stay-cool wicking technology Trim: 4-ounce 100% poly jersey with stay-cool wicking technology OGIO Endurance heat transfer label for tag-free comfort Center back keyhole cutout with reflective O heat transfer below Contrast binding at neck armholes and side seams Reflective O Endurance heat transfer at front left hem Curved drop tail hem