Make your dog stylish by day and visible by night with Petmate's ® Green Dots Glow in the Dark Dog Collars. These self-sustaining, glow in the dark dog collars charge under any light source by simply leaving the collar under a bright light source for at least 15 minutes. During the day, the cool green dots pattern keeps your dog's style on point. At night, the green base glows bright leaving a dotted glow pattern and making your dog visible during evening walks or in dark rooms of your home. Designed with your dog's comfort in mind, Petmate Glow in the Dark Dog Collars are made from a soft rubber material thats odor-resistant and easy to clean. For a comfortable fit, each collar adjusts in length so that it fits perfectly around your dog's neck. Illuminate the night sky is Pemate's Green Dots Glow in the Dark Dog Collars.