The Helmet Marker Plus makes you clearly obvious from behind in dark and inclement weather. The included hook-and-loop strips allow for the secure placement of your choice on your helmet. It features a surprisingly thin, durable polymer strip encased in weather-resistant nylon fabric, decorated with a reflective pattern for extra visibility. Press once for steady glow, twice for continuous flash, put your helmet on, and your helmet becomes a beacon that makes you brightly obvious to the cars/skiers/cyclists behind you. The bonus Gear Tie Reusable Rubber Twist Tie offers a convenient second attachment option-just twist the ends to secure the Helmet Marker Plus around your seat post, backpack strap, handlebars, baskets, or rack.