The Jessi Shirt from Flylow is a technical, short-sleeved running or biking shirt. With breathable, wicking fabric and a long, flattering fit, it blurs the line between gym clothes and everyday favorite T. Plus, the Jessi Shirt blocks body odor before it starts, thanks to a high-tech, silver-based Ionic+ antimicrobial treatment that lets you go days without washing it when you’re on the road. The stretchy, heathered fabric feels soft to the touch. With modern styling and a casual fit, the lightweight Jessi Shirt is the perfect shirt for running, biking, or simply hanging out. Note: The fit is a smaller than normal size medium and ideal for a longer, taller and slim body. I don't recommend this shirt for someone with a larger chest.