This half-zip is a great complement to your usual tennis garb, as it makes sense to wear before or after your most grueling of matches. Looks great as casual wear, too, when wintry winds pick up a bit too much for your taste. Sleek Stretch Jersey: 85% Polyester/ 15% spandex. Light weight tennis piques: 96% Polyester/ 4% spandex. Material: Polyester, Spandex.