Material Safety:-We use PVC for all of our glowing wall decals, which is non-toxic and environmentally friendly, making them perfectly safe for children Long Glow Duration:Absorbs light for a few hours under the daylight or lamp light to shine brightly yet decently for up to 8 hours and more Are easy to use and remove: Our glow-in-the-dark stickers are easily removed without leaving any residue. During the day, they are murals. When at night, they shine like the real sky, accompany your kids to sleep. Perfect room decoration: The moon and stars wall stickers are perfect for room decoration, a ceative gift to create the perfect starry sky . you can stick them not only on the wall but also on the ceiling, light switches, door handle, etc.