The removable wall sticker is made of premium ECO-friendly waterproof PVC.This home decor is safety so rest assured to use them. The decoration is easy to paste and remove without harming the surface of the wall.If you use it in the correct way, this wall sticker can last for long times without peeling, wrinkling or fading. This sticker is very suitable for nursery, bedroom, playroom, living room, children's rooms. Make sure the wall surface is smooth,clean,dry and dust-free.When removing the wall sticker,you can use a hair dryer to heat the adhesive, and then use a knife to lift the corner of the sticker gently and peel it off slowly. This premium decal is convenient to use.Just peel them off carefully and stick them on the smooth,clean,dry and dust-free surfaces with your hands.If there are some bubbles,you can use a scratch card to remove the bubbles or use a needle to pierce the small bubbles and smooth them, it will not affect the overall paste effect.If you find that the side of the sticker is slightly rolled up, use a hair dryer to slightly heat the adhesive and press it firmly.