Using this T - shirt is easy. Just put it on like any other top and you're ready to go for your workout, relaxation, or daily activities. When it comes to sizing, remember that it's a slim - fit style, so check the size chart carefully before buying. As for maintenance, you can machine - wash it in cold water with like colors to keep it in good condition. Avoid using bleach as it may damage the fabric. After washing, tumble dry on low or hang it to dry. Due to possible color differences from the monitor and hand - measuring inaccuracies, don't be surprised if the actual color and size vary a little from what you see online.