The Norsk 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 primary colored interlocking foam mats with straight edge borders to provide a finished, uniformed look. Each interlocking mat is .47-inches thick at 24-inches (L) by 24-inches (W). All Norsk foam mats are latex free, lead free, ASTM rated child safe and ideal for use in schools, daycares, churches, basements exercise rooms, camping and recreational areas. Norsk 240147 interlocking foam mats come with a limited lifetime warranty. Patents US 9,289,085; US D532,238; and Patents Pending.