Weve deployed leading safety technology and the highest levels of testing to ensure the Vanguard is our most progressive mountain bike helmet yet.Key Features:In-mould polycarbonate shell with EPS linerIntegrated fixed chinbar for full face protection.ASTM 1952-15/2032-15 and NTA 8776 certified makes it safer5 Stars at Virginia Tech Helmet Lab independent testSafety Release and flexible injected visor to avoid extra rotation of the neck in case of a crashSafe-T Heta Fit System360° Head belt, 3 vertical adjustments leave you with an individual fitAnti-pinch ratchet buckle makes it easier to secure the helmet24 Vents, Internal engineered air channeling system to improve ventilation and comfortAdjustable cheek-pads to achieve the perfect fit, 2 thicknesses includedHand washable comfort padsWide field of view makes it compatible with every goggle and sunglassesHelmet soft bag includedCertifications: CESize: S: 52-56, M: 56-58, L: 58-61cmWeight: S: 670, M: 790, L: 750g