The 5.0 MPG arm guards include Warrior's VaporTek lined perforated EVA foam body construction and ExoLyte Triple Density Impact Protection, but that is just where it gets started. The ExoLyte custominjection molded plastic caps are contoured and vented for comfort. The ergonomic shape providesflexability and comfortable fit, and the no-slip pads on liner help prevent pads from slippingdown arm. Lower arm shock pads, inner forearm shockpad add to the overall protection. And the SilverOxide Metaleather outer construction is extremely durable. Overall this guard is an excellent value for a lot of protection and comfort.