Baleaf Women's 1/2 Zip Running Shirt Mesh Cool Workout Jacket Blue Size M 60% Nylon / 28% Polyester / 12% Spandex Stretchy, soft, super lightweight material with breathable mesh back panel wicks away moisture and dries quickly to keep you cool and comfortable Thumbhole cuffs help the top stay in place and offer a secure fit. Please refer to the size chart in last picture, if you prefer a loose fit, please choose one size up Security zip pockets at two sides for convenience, fitted hood for warmth and cool look Half front zipper ventilates on demand. Opened to enhance breathability, raised collar to keep your neck warm in the morning and night Cool feeling fabric offers instant and prolonged cooling while hiking, running, working out