The Nite Ize LED Safety Sport Vest is a lightweight, fashion-friendly black, mesh vest made with 3M Scotchlite reflective material, and features 2 illuminated flexible polymer strips (front & back) that can be set to 1 of 2 bright LED Light modes: steady glow or flash. Wearing this NiteIze LED Sporting Safety 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 and instantly visible to oncoming traffic. Universally sized with easily adjustable hook and loop at the waist, the Nite Ize LED Safety Vest is easy to slip on and off. Power/mode buttons are easily accessible on the front and back of the vest, and elastic sections with hook and loop closure allow adjustment at the waist for a snug fit. NiteIze LED Safety Night Vests are perfect for early morning and late night runners, bikers, and anyone else who wants to be seen and be safe on dark roads and trails.