The Giro Feature MIPS Mountain Bike Helmet merges enhanced impact protection with low profile, trail savvy style. The big story with this helmet is its MIPS or Multi Impact Protection System. Originally developed by Scandinavian neurosurgeons, the MIPS system places a low friction layer in the helmet to reduce concussion causing rotational acceleration of the brain resulting from impacts. Ultimately, this means you'll be better equipped to come out unscathed from serious spills when you're pushing your limits on the trail. Giro's In Mold construction mates a polycarbonate shell with an EPS liner, allowing Giro's designers the opportunity to place better ventilation within the helmet, as evidenced by its 12 vents with internal channeling. Its adjustable moto style visor keeps the sun from obscuring your vision when you're riding through open areas on bright days. Additionally, you'll find Giro's In Form fit system for a dialed fit with the simple twist of a dial.