Bookman Urban Visibility - Hanging Reflector Circle PinkDesigned to dangle these reflectors will maximize visibility in low light environments. The neat plastic clip and strong cord provide secure fastening to your clothes or bag. Whether cycling, walking the dog or taking a midnight stroll, attach them to be seen in the dark and make your twilight journey safer. A reflector increases the distance from where you can be seen by approaching traffic from 25 meters to 125 meters