The FireFly Safety Running and Biking Light Spurs provide super bright high intensity light that easily clip on to your shoe heel and allow you to be seen in the dark and stay safe. The FireFly light spurs help keep you safe and visible during night time runs or bike rides. The FireFly heel lights are lightweight and quickly and comfortably clip on to the back of your shoe and light up the night for high visibility while running, walking or biking in the dark. The Schatzii FireFly Safety Running and Biking Lights allow you to be seen at long distance in the dark. The lights come in high intensity bright green or red, and will last up to 100 hours of continuous use before having to replace the battery. The FireFly Safety Lights have 2 operating modes: 1) Always On and 2) Continuous Flashing, and are visible from far away. The FireFly is comfortable, form-fitting to your heel, and super lightweight so you won’t even know they’re there. Stay safe with the Firefly running and biking lights. The bright high intensity lights help keep you visible and stay safer while out at night. One size fits all. Available with Green and Red lights.