The Nite Howl LED dog safety necklace is adjustable to keep four-legged friends of all sizes safe and visible in the dark. This weather-resistant, durable safety necklace is made with a flexible polymer tube and is illuminated 360° by two bright green LEDs. It has glow and flash modes and can simply slide over your dog's neck for hours of nighttime fun and safety. As fun as this product is, the best part about the Nite Howl is that it keeps your furry friends safe on those late night walks and campsite moon-howling sessions.