The Signal helmet provides cyclists an exceptional custom fit and elevated protection wrapped in Smith's signature style. By integrating Smith's proven VaporFitfit system with a MIPS® liner systemthe Signal delivers a tailor-made fit for every rider across four unique shell sizes. The Signal's AirEvacventilation system and engineered eyewear storage delivers the ultimate integration you expect from a Smith helmet. Lightweight in-mold construction MIPS system available in all colors VaporFit adjustable fit system 21 optimized vents Performance comfort lining Ultra-light single layer webbing AirEvac ventilation Ultimate eyewear integration CERTIFICATION: CPSC, CE EN 1078, AS/NZS2063 SIZE S (51-55 cm) M (55-59 cm) L (59-62 cm) WEIGHT: 11 OZ / 300g (Size M)