Ride with the Giro Montaro MIPS Cycling Helmet to protect your control center without weighing yourself down. Designed for long days spent on the trails, the Montaro is constructed with a durable In-Mold polycarbonate shell surrounding an impact-absorbing EPS foam body. MIPS, or Multi Directional Impact Protection System, is added to the innermost layer of the helmet in the form of a thin lining that rotates slightly upon impact to absorb the brain-damaging rotational energy created in certain crashes.Compact shape offers deep, confident coverage, and the Roc Loc Air fit system boosts ventilation while improving fit18 vents with internal channelingIn addition to this helmet's already impressive cooling power, it's outfitted with hydrophilic, antimicrobial pads that can absorb up to 10 times their weight in sweatFull goggles integration with strap grippers on back of helmet; P.O.V. Plus(TM) visor allows you to lift the visor and place your goggles on the front of the helmetFull camera-mount integration offers a clever breakaway interface for your favorite light or action camFull-wrap, in-mold polycarbonate shell with EPS liner; Roll Cage reinforcementSizes: S: 20 - 21.75 inches; M: 21.75 - 23.25 inches; L: 23.25 - 24.75 inches