The Nike Pro Flex Vent Max Jacket combines sweat-wicking technology with stretchy woven fabric to help keep you dry and moving comfortably before, during and after your workout. This product is made from at least 75% recycled polyester fibres. Natural Movement Nike Flex fabric stretches with your body, helping you get the most out of your performance-without getting in your way. Quick-Dry Comfort Nike Dri-FIT Technology moves sweat away from your skin for quicker evaporation, helping you stay dry and comfortable.