Starting with a stylish shell made of their high performance, lightweight Kinetic Polymer Alloy (KPA) Technical fabric liner is hypoallergenic, moisture wicking, removable and washable Flow-through, ported ventilation keeps you cool on the hottest of days The short peak and Twin Shield System drop down sunscreen will protect your eyes when the sun is in the horizon Sun shield has a unique, two-stage adjustability: lock it half way for just a little shade, or full open for total sun protection Dual-density EPS meets or exceeds DOT standards. DOT approved micrometric, quick release chin-strap, and you have all the convenience and comfort of a traditional motorcycle half helmet, but with the technology of the future This helmet is set up for easy and seamless installation of LS2 LinkIn Bluetooth communication system (LinkIn sold separately)