Sure you can hop on the bike with any old T-shirt, but the Kitsbow Ride Tee is one that is meant for a ride. It is made from New Zealand Merino wool, and each shirt has embroidered nylon shoulder panels for added abrasion wear resistance along with a stitched chest past pocket. It is available in three colors including Olive, Gray Heather, and Charcoal Heather.
Sizes range from XS to XL so it should also fit to a T.