ArmorFlex® OS system is a variable size, articulating mat consisting of machine compressed concrete units. Each unit is kiln dried, resulting in compressive strengths over 3,000 psi. After the units have been manufactured, mats are assembled by lacing the individual units with corrosion resistant polyester cable. Polyester cable and aluminum fittings provide for a long lasting, non-corrosive connection allowing the retrieval of a mat that has been in place for many years. The ability of the ArmorFlex OS open cell system to withstand wave action during placement in rough seas makes it superior to competitive systems. The method of assembly of the ArmorFlex OS system provides for mats of varied dimension and are available with or without abrasion resistant pads. Mats are typically eight feet wide by lengths as required by design. These custom-made mats can reduce installation time when compared to other concrete mat systems.