Alpinestars Top Short Sleeve underwear series provides a safe and comfortable layer underneath your suit, boots, and helmet * 180gr 100% Nomex®/Meta-Aramide construction for maximum safety. “DuPont™, the DuPont Oval Logo, and all products, unless otherwise noted, denoted with ™, SM or ® are trademarks, service marks or registered trademarks of affiliates of DuPont de Nemours, Inc.”