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. A-Z tracing on the front, numbers 1-10 on the back with 4 black handwriting lines. Use with dry erase or water based markers and washable crayons. Each side is an interactive lesson. Mat measures 12" x 17".