Ultra lightweight arm protection. Exposed hard ABS poly plastic outer shell on the bicep, elbow and forearm for superior protection. Dual density compression molded construction for two layers of protection in some of the slimmest pads on the planet. Ventex IceFil Vaportek liner that is cool the to the touch and offers unbelievable comfort in the heat. Inner sweat channels control moisture. Inner arm sleeve for a snug, comfortable fit.