Use them for dirt biking, love them, build quality is very good and i find the fit and function to be very good as well. They are a tad heavier than what is available, I have used a suomy in the past and they are lighter but for crashing hard the far is better I believe.
Advertised weight of the carbon is 1220-1250. So about the same as the 509 or the klim. But your right not as light as the suomy or airoh. Thanks for the input!