The PRO of the title is not usurped.

Significant weight but comfort is total, and manufacturing above all suspicion, good exterior insulation in both directions, the sound quality is up to the Standard KOSS, full, accurate, and especially with an impressive balance for a closed helmet, without overload in severe or acute as the majority of current helmets (you have to believe that MP3 is usable ...) In short, a high not too expensive range that will delight the (true) audiophiles, sound professionals as I am.