All of our products are adhesive backed vinyl decals applied to the exterior of windows or other hard non-porous smooth surfaces. Decals are die-cut to the exact shape of the image. We use an Intermediate 2.5mil High Gloss 5-Year Calendared Vinyl. The vinyl used is UV and water resistant, and will last for many years without fading, peeling, or cracking. Detailed instructions are included with each order, and be sure to visit our How to Install page.