All of our shirts are sewn using the Merrow® ActiveSeam technology, this shirt will move with you and keep up with every mile without rubbing or irritation. Our shirts were designed to be fitted, so if in doubt about size or you simply prefer a looser fit, we strongly recommend ordering a size up. Don't see a color you like? Looking for your favorite team colors? If there is a color or combination of colors you like and we are not currently offering that choice, please visit our Contact Us page and let us know. Many times it is a simple matter at no extra cost to you.