The Nite Ize Nite Dawg Light-Up Collar is the answer to every night-loving dog owner's problem: losing sight of their best buddy after sundown. Made of high quality nylon, this lightweight, durable collar houses a flexible, light-transmitting polymer core that illuminates when the collar is turned on. Powered by a super-efficient (100,000 hour) LED bulb, it's literally a brilliant way to keep your dog safely visible—to you, to other people, to cars—during any late-day or early morning outing. The Nite Dawg collar has two mode settings, flash and steady glow. Fully weather-resistant, visible up to 1000 feet in the dark, and powered by a long-life, easily replaceable battery (included), it's simply the best way to keep your dog's presence clear and obvious, from dusk till dawn.