HJC IS-33 II Open-Face Motorcycle Helmet (Silver, Large) Advanced Polycarbonate Composite Shell is lightweight with superior fit and comfort using advanced CAD technology Aerodynamic shell with large eyeport for greater visibility Impact absorbing, single-density EPS liner One-touch integrated smoke-tinted inner sun shield deploys and retracts quickly and easily and is adjustable to three positions ACS Advanced Channeling Ventilation System provides flow-through ventilation