Men’s ribbed t-shirt / undershirt Cotton/spandex Machine wash Jocko® style J1062 Introducing a new essential for every guy – the fashionable, great-fitting Roscoe ribbed t-shirt from Jocko. Made of a stretchy cotton-spandex knit, the Jocko Roscoe ribbed undershirt is constructed with the wearer in mind: relaxed, yet flattering fit, lightweight fabric, and a sleek style you can wear almost anywhere. At the gym or out on the town, this men's t-shirt is made to perform.