Shell FCH Hydroex fibre glass Innerliner Comfortable interior with washable, removable lining Peak flexible Competition peak with aluminum bolts & TF quick-change bolt Lock Double-D ring Aluminium Features M.A.R.O Anti Roll Off System ECE 22.05 Weight: 1050g M.A.R.O. Anti-Roll-Off-System "M.A.R.O." (Marushin-Anti-Roll-Off) system. This is claimed to prevent the helmet from pivoting. off the head from behind & to also reduce the amount of helmet roll that could hurt the rider s. neck in a crash.