Smart Poly™ material has been designed for charts in the classroom and home. These charts are strong, durable, water resistant, and do not need lamination. They can be displayed like any chart with hooks, Ashley Smart Tak™, pins, tacks, staples, etc. The surface is designed for dry erase and water-based markers and washable crayons. Details: Multicolor 13" x 19" 45 mm Pack of 6 Write-on/wipe-off surface dry-erase glossy surface For use with dry erase or water-based markers and washable crayons Water resistant, no lamination required Heavyweight, durable, poly material