90% polyester, 10% spandex, heathered, 145 gsm;Hidden zipper with mock neck; Durable performance with racerback stitchin; Full stretch; Fly Life: easy care, veratile, designed for comfort; Swannies Golf Apparel partners with Green Story for a Carbon Neutral impact; Carbon Offsetting: Through our collaboration with Green Story, we offset the carbon footprint of each of our products by supporting removal & reduction projects across the globe;