Born from Bell’s extensive and legendary experience, the Bell MX-9 MIPS DLX Helmet blends the best of their dirt and street knowledge into a feature packed middleweight ADV helmet. Equally at home on the street as it is in the dirt, the MX-9 panders to those riders who are out there pushing boundaries and not stopping when the road ends and the trail begins. The MX-9 MIPS DLX comes jam packed with the features of the MX-9 Adventure and also includes the Transitions Adaptive Face Shield. The lightweight polycarbonate shell comes in three different sizes, mitigating bulk and providing a more comfortable fit. Bell’s velocity-flow ventilation system keeps air flowing, forcing fresh air in and hot moist air out, while the removable and washable liner and cheek pads ensures you can keep sweat and bacteria build up at bay. Features: MIPS Multi-Directional Impact Protection System for dramatically improved rotational impact energy displacement Lightweight polycarbonate shell Transitions Adaptive Shield included Velocity-flow ventilation system for cooling and comfort Moisture wicking, removable/washable air channeled comfort liner EPS-lined chin bar Adjustable mouth vent Padded chin strap with D-ring closure and strap keeper Five-year warranty DOT and ECE certified 3 Shell Sizes SM: XS and SM Helmets MD: MD and LG Helmets LG: XL and 2XL Helmets Size Chart Helmet Size CM IN Hat Size (IN) XS 53–54 20 7/8 – 21 5/8 6 5/8 – 6 3/4 S 55–56 21 5/8 – 22 6 7/8 – 7 M 57–58 22 1/2 – 22 3/4 7 1/8 – 7 1/4 L 59–60 22 3/4 – 23 1/4 7 1/4 – 7 3/8 XL 61–62 23 5/8 – 24 7 1/2 – 7 5/8 XXL 63–64 24 1/2 – 24 3/4 7 3/4 – 7 7/8 XXXL 65–66 25 5/8 – 26 8 1/8 – 8 1/4 Cheek Pad Size MM Hat Size (IN) XS 40 Interchangeable (XS–XXXL) S 35 Interchangeable (XS–XXXL) M 40 Interchangeable (XS–XXXL) L 35 Interchangeable (XS–XXXL) XL 35 Interchangeable (XS–XXXL) XXL 30 Interchangeable (XS–XXXL) XXXL 25 Interchangeable (XS–XXXL)