Constructed from durable, and non-toxic, eco-friendly EVA foam, this extra thick, reversible construction is perfect for MMA, Karate, Jujitsu gymnastics or other high impact sports. Each kit comes with (12) 24" x 24" x 1" interlocking padded tiles for a total of 48 sq ft of coverage. Other sellers are selling lower quality and less quantity for about the same price. These are a great addition to your home gym and provides you with a comfortable spot to do floor exercises such as gymnastics, tumbling, wrestling, yoga, and more! The interlocking system easily locks and comes apart, so you will no longer have trouble transporting the mat to and from gymnastics or sporting event.