Chalkcloth yardage is a proprietary wipe-clean, flexible, and reusable vinyl material to be used just like you would a chalkboard or slate. Fun for kids and low tech grownups! Striking black or classic green. School days good old golden rule days. Phthalate free so is safe for children's products! Winner Best New Product at HIA in 1997. It is important to cure your Chalkcloth before you use it the first time. Do this by layering a piece of chalk on it's side on the surface of your Chalkcloth and rubbing it all over, side to side, top to bottom. Then erase the chalk. Repeat process again. Ready for hours of enjoyment!