The LED dog collar is the latest innovation in pet safety and fashion brought to you by Dog-E-Glow. Our products are truly one of a kind, combining high quality materials with catchy, fun designs and the functionality of bright LED lights. Our collars are made of nylon sewn around several highly-efficient (100,000 hour) LED bulbs. The lights are only visible when turned on, either in steady glow or flashing mode. Dog-E-Glow collars are lightweight, highly durable, fully weather-resistant, and visible up to 1000 feet in the dark. Batteries are easily replaceable after 150 hours of LED use (replacement batteries included!). Unlike other lighted dog collars on the market, Dog-E-Glow products actually look great as normal collars too! With Dog-E-Glow collars your dog will look sharp during the day and with the push of a button be safer and more visible at night. Hiking, camping, tailgating, biking, or just in the front yard, there are numerous situations when keeping track of your dog at night comes in handy. Combining them with our LED leashes is perfect way to keep your dog visible to you, other people, and cars at night or times of low visibility. Collars are available in Medium (10? ? 15? neck size) and Large (15? ? 21? neck size).