The Killian M05 Full-Face Helmet is loaded with functionality. It features channel vents for cooling airflow, retractable sun shield to help diminish glare, and the sleek, stable thermoplastic shell design for full-face coverage from the elements. Want more? This men's full-face motorcycle helmet is compatible with BOOM! Audio 20S Bluetooth® Helmet Headset to help keep you connected to fellow enthusiasts on the journey.