The Yamaha Y17 Helmet by HJC® features: Full Face Advanced Polycarbonate Composite Shell lightweight, superior fit and comfort using advanced CAD technology One-touch Integrated Sunshield- 3 stage adjustable sunshield deploys quickly and easily Optically superior Pinlock®-prepared 3D face shield- provides 95% UV protection Innovative Center one-touch open/close locking system designed for an extremely secure seal “ACS” Advanced Channeling Ventilation System- full front to back airflow flushed heat and humidity up and out SuperCool® Interior- crown and cheek pads are removable and washable DOT approved