2 Sided Learning Mat Constitution Bill of Rights Smart Poly 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. See the signers of the Constitution and on the reverse side study the Bill of Rights. Specifications Mat Measure: 12" x 17". Weight: 0.2 lbs.