Smart Poly™ material has been designed for the classroom and home. The material is strong, durable, water resistant, and does not need lamination. Heavy duty double-sided surface for fun and colorful learning on both sides. Write-on/wipe-off surface. Front features 5 different lines to trace to practice prewriting. Back features basic shapes to trace. Use with dry erase or water based markers and washable crayons. Each side is an interactive lesson. Mat measures 12″ x 17″.