*The anti-fatigue floor mats are constructed of a very durable yet soft, weight displacing foam.  The foam is manufactured using a technique that cross links the cells to insure the foam re-bonds creating a high performance product.  It is widely used in tumbling mats and other safety mats that require the weight to be distributed quickly and evenly through out the surface of the mat.  The unique crosslink construction makes these mats virtually free of “break down” after repeated usage.