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. Use with dry erase or water based markers and washable crayons. Each side is an interactive lesson. Mat measures 12" x 17" . The Early Education Set includes 7 learning mats: Sight Words (95005), Prewriting/Shapes Tracing (95011), Manuscript Tracing (95012), Telling Time (95018), ABC/Numbers 1-20 (95020), Colors/Shapes (95022) and Numbers 1-10 (95023).