I live in Alaska and our fall and winter seasons are very long and dark. I have been using the LED dog harness to walk my dog in the winter for 2 seasons. This is one of the toughest items I have ever bought for my dog. He would be totally unseeable without this beautiful lighted harness. I would be lost without it. I have recently trusted him to go out early in the morning unsupervised and I put the harness on him with blinking lights so I can see him in the yard and be sure he's not wandering away into mischief or danger. This harness is perfect for my part of the country. I recommend it to anyone who wants to be outside with their dog in the dark.