Aerodynamic poly alloy plastic shell design for light weight and strength MIPS technology between the comfort foam and the EPS liner Compound-curved, scratch-resistant, and optically correct face shield Removable shield to allow open-face riding and use of goggles For proper fit and size measure the circumference of your head 1" above your eyebrows and around the largest portion of the back of your head The MSR Xpedition ADV Helmet is the perfect helmet for Adventure, Dual Sport, or even UTV riders. The MSR Xpedition ADV Helmet w/MIPS features Multi-directional Impact Protection System MIPS was developed by brain surgeons and scientists to reduce rotational forces on the brain caused by angled impacts to the head. Adding MIPS to the Xpedition helmet brings state-of-the-art safety technology for which other companies charge double. Safety is key with all MSR helmets. Xpedition also features a Fog Shield, liner and a wind screen under the chinbar area. It has an shell constructed of advanced poly alloy plastic for strength while being lightweight. A compound-curved, scratch resistant and optically correct protects the sun. The can be removed for open-face riding or goggle use. There are 9 points of ventilation to keep you cool on those warm days along with a comfortable mesh liner, which is removable and washable. To top it off the MSR Xpedition ADV Helmet meets or exceeds all DOT requirements