Material: PVC static clings, removable Environmentally friendly, non-toxic, non-fading, waterproof, also safe for children. Where to use: They are perfect for home windows, glass storm doors, mirrors or any other smooth surface. We do not recommend using them on car windows as heat may cause them to shrink or peel. Easy to apply: Remove and reuse without leaving damage or residue, apply to any clean and dry flat surface; the size after application can be adjusted according to your preference