Smart Poly™ material has been designed for the classroom and home. The material is strong, durable, water resistant, and does not need lamination. The learning mat features the Periodic Table of the Elements labeled on the front and blank on the back. Up to date with elements. Heavy duty double-sided surface for fun and colorful learning on both sides. Write-on/wipe-off surface. Use with dry erase or water based markers and washable crayons. Each side is an interactive lesson. Mat measures 12" x 17".