T-Shirts & Polo Shirts for Bikers T-shirts are simply part of the biking lifestyle. That's why Louis stocks a huge range of over 80 different T-shirts and polo shirts. Essentially, there's something to suit every taste, so you're certain to find just the right design for you. What's more: If you're in any doubt about size, you can order two different sizes from Louis online and try them on. Louis will take back any item that does not fit or which you do not like.