These stickers are made of PEVA material, which is thick, not easy to tear and stick firmly, won't leave any sticky residue on your cell phone. You just need to tear off the white paper at the bottom and stick it where you want. Very easy to use, ideal tool when you are relaxing and concentrating. It can be used as your stress reliever wherever you go. When you feel anxious or uneasy, adjust your breathing by touching the texture of the sticker to help you regain your calm. 1 location includes the shipping cost to US. Orders of 50,000 pieces or greater are eligible for sea shipping. 100% guarantee for quality. Rush Service.