From H.I.T.T. Shield...The HITT-SHIELD Defender Skullcap made with our patented Non-Newtonian Dilatant Fluid (NDF). NDF out performed every protection material available to the consumer. Our High Impact Transfer Technology (HITT) demonstrates up to 80% reduction in both linear and rotational impacts. This absorption and dissipation of these forces go far beyond what any helmet can do.