STAY-COOL WICKINGULTRABREATHABLEFLATLOCK SEAMS FOR COMFORTREFLECTIVE DETAILS 4.4-ounce 100% poly jersey with stay-cool wicking technology OGIO Endurance heat transfer label for tag-free comfort Raglan sleeves with contrast flatlock seams Contrast flatlock side seams Reflective O heat transfer on left sleeve Reflective stacked O heat transfers at center back Reflective O Endurance heat transfer at front left hem