The Norsk 240247 Interlocking Foam Mats are made from recycled materials to providing a environmentally friendly flooring solution for your garage, basement or any other room of your house. These mats are extremely durable and will last for years. The foam mats assemble easily like other flooring options including, puzzle mats, foam tiles, garage tiles and foam play mats. This set includes (4) gray interlocking foam mats with (8) straight edge borders to provide a finished, uniformed look. Ideal for use in schools, daycares, churches, basements exercise rooms, camping and recreational areas. Patents US 9,289,085; US D532,238; US D543,764 and Patents Pending.