Bell Super 2R MIPS Equipped MTB Helmet 2015 Multi-Directional Impact Protection System (MIPS) is a slip-plane system within the helmet that's designed to rotate inside the helmet with the intent to potentially slow or reduce the amount of energy transferred to or from the head, possibly reducing he Fusion In-Mold Polycarbonate Shell is the result of an in-molding process which bonds the helmet's Microshell to its EPS foam layer for a sturdier, more solid helmet Internal Reinforcement is a fortified composite skeleton which allows for bigger vents, more advanced styling and lighter weight, while still meeting stringent safety standards 23 large channeled vents bring cool air in through the front, allowing it to pass over your head and then flushes warm air out of the rear ports -- so YOU stay cool and your HEAD stays cool