Quick answer: Energy Reduction Technology (ERT) is a layer of soft polymer pads between a helmet’s EPS liner and the comfort padding. It helps absorb energy from both direct and angled impacts. In independent comparative testing by SGS, MAXIMUS performed best of four helmets in two of the three impact tests. In an angled impact, the wearer’s head twisted the least. That matters because twisting is linked to brain injuries such as concussion. Against a hard edge, the head was jolted the least: 74 g, compared with 129 to 326 g for the other helmets. On a flat surface, MAXIMUS recorded the highest value of the four (156 g), but stayed well below the 250 g reference limit.