Pacon Dry Erase Clouds are perfect for single or group classroom use for math, writing, word practice, games and more! These shapes have an extremely high quality dry erase surface, a thick durable foam inner layer for tear-resistance, and a unique tacky backing that make them repositionable and reusable hundreds of times. These removable shapes stick to almost any clean, dry surface, including whiteboards, desks, doors, windows, cabinets, mirrors, lightly textured walls, floors, plexiglass, appliances and much more! When they get dirty, just wash them off with water, and they will stick just like new! Also great to use around the home and office. Don't forget to remove the thin, protective layer off of each shape before use!