Exposed hard ABS poly plastic outer shell on the bicep, elbow, and forearm for superior protection. Dual density compression molded construction gives you 2 different layers of protection in some of the slimmest pads on the planet. Ultra lightweight coming in at only 7 ounces (198.4 grams). Vaportek liner that is cool to the touch and gives you unbelievable comfort in the heat. Interior sweat channels move moisture away from the body through pre-molded channels. Arm guards contain an interior arm sleeve for a s snug yet extremely comfortable fit.