4-ounce, 100 percent poly jersey with stay-cool wicking technology (White and Pace Yellow are 4.6-ounce). Self frabric collar, 4-ounce, Reflective O heat transfer at back neck Reflective O Endurance heat transfer at right hem Self-fabric collar Reflective stacked O heat transfers at backItem Size: Please contact Customer Service at 877-787-4564 for more information.Imprint Area: Please contact Customer Service at 877-787-4564 for more information.