Add cushioned flooring to your exercise area living room basement den or playroom with the Interlocking Foam Tiles by Stalwart. The 16 tiles of this foam flooring feature an interlocking puzzle-piece design that you can combine in multiple configurations. The nonskid textured foam makes this lightweight foam puzzle floor mat an excellent way to safely cushion a concrete floor or protect the finish of a hardwood floor. Nontoxic free of lead and easy to keep clean with just soap and water these foam squares work well as a child s play mat or as a workout mat in a home gym.