Literally be light on your feet with the Nathan LightSpur that attaches to the back of your shoes for greater visibility in low light. Whether you’re biking, running, or walking, you can stay out longer with this bright, water-resistant accessory. Blinking and steady light modes offer higher visibility. Perfectly tensioned to stay on shoes during high-impact motion. Includes 2 easily replaceable watch batteries. Fits shoes up to size 15.