509 Short Straps for the 509 Altitude 2.0 Helmet make it easy for you to quickly put on or take off your goggles without ever removing your helmet or adjusting your straps. Rugged, trail-rated 3M adhesive locks these half-length straps to the side of your helmet while the quick-release Velcro tabs let you add or remove your goggles in a flash. Offered in two styles: one for the 509 Sinister X6 Goggle and one for the 509 Aviator 2.0, Kingpin, and Revolver Goggles.