Giant Chess Nylon Carpet Mat - 8 Foot (School Certified) Chess4LifeThis mat provides a certified safe, giant chess play surface for schools. The carpet chess board is designed by Chess House for our 25 tall giant chess sets. The chess board is certified safe for schools. This means it is CRI Green Label Plus certified with a Class I Flammability Rating that meets or exceeds California indoor air quality standards for low emitting products used in schools. The 8 foot square chess board rolls up for storage and easily