Environment friendly. GREEN-GUARD - certified. Materials are PVC-free, VOC-free, and formaldehyde-free. Class "A" fire rating. We use water-based, non-toxic, eco-friendly inks. Suitable for use in nurseries, schools, hospitals, and restaurants, PEEL AND STICK WALLPAPER With peel and stick wallpaper, you can easily apply it without extra glue. This paper makes wall covering work very easy. -No glue is needed, -Self-adhesive, -Vivid colors, -Material does not shrink over time, -Odorless water-base