Their quality placemats and coasters use a 5mm board topped with a unique and exclusive art print. Each is totally sealed with a high-quality coating that is both stain and heat resistant to 212°F. The placemats and coasters are then finished with a hard-wearing cork back that protects precious furniture. If you love the beach, Coastal Signs are a great accessory for your decor, depicting old fashioned seashore-type signs for boat rentals, the lighthouse ferry, clams, and other seafood.