Since dogs don’t have built-in lights, they have to wear lighted safety vests just like we do. These comfortable, lightweight, weatherproof, part-mesh vests are black with ultra-bright side-by-side red LEDs that run down a red stripe on your pooch’s back. The (3)-mode push button allows you to cycle through rapid-flash, slow-flash and constant. Vest is adjustable with hook’n’loop fasteners, and lights are rechargeable with the included USB cord. They come with a nice, zippered storage pouch, too. You pick the size: Small (approx 13” long) with (4) pairs of LEDs; Medium (approx 15” long) with (6) pairs of LEDs; or Large (approx 19-1/2” long) with (8) pairs of LEDs.