➤ Durable & Adjustable for Pets - Super strong 100% polyester webbing material with high-tensile stitching for maximum strength & dog security. Easy to put on with a quick-release buckle. And the length of our led dog collar can be adjusted to fit any size. You can even use the led dog collar for animals such as sheep, deer or ponies. ➤ Adding Safety To Night Activities - Super bright optical fiber for improving the visibility of your dogs in the dark or the blind spots, to avoid car-accident or any other potential dangers. At the same time, it can also anti-lost. When your dog is running outside, our collar will make you feel more at ease.