Head & brain protection. The wait is over! Finally, here is a helmet with brain rotation & concussion reduction technology! The helmets feature 360° Turbine Technology & the 3.5 helmet is DOT/ECE certified. The helmet is lined with turbines which are 360° moving discs constructed of an energy-absorbing shape & material. The 360° Turbine Technology has two exclusive advantages, namely the reduction of rotational acceleration to the head & brain & the absorption of energy upon impact at concussion level. Features Injected Polymer Compound shell in three sizes Multi-density impact foam Dri-Lex® moisture wicking, breathable, anti-odor & washable inner liner Optimal neck brace compatibility Superior ventilation Visor with breakaway function for rotational reduction in a crash Emergency cheek pad removal Weight: from 1270g (2, 8lbs) Specifications Certified & tested DOT+ECE 2205 360° Turbine Technology Reduces up to 30% of head impact at concussion level Reduces up to 40% of rotational acceleration to head & brain