Simply attach this tag to your dog’s collar to enable you to be able to see them when out and about at night. This tag also makes a great key ring - so you'll be able to find your keys quickly and easily should you ever drop them when out walking your dog at night! This range of Lumivis products has a patent application on the design and method using night glow materials. During the day they look almost white but at night glow very brightly. They are easy to wipe clean, odour proof, rot proof, very strong and as no battery is required they are long lasting and very eco friendly. Hand-made here in the UK.