This lightweight black mesh vest is made with 3M Scotchlite™ reflective material, and features two illuminated flexible polymer strips (front & back) that can be set to one of three modes: steady glow, flash, and off. The LED's are bright, highly visible and have a life of 100,000 hours. Wearing this vest when you're heading out for a run or ride in the dark is a comfortable, effective way to ensure you'll be highly, instantly visible to oncoming traffic. Universally sized with hook and loo