ΩGreatPurchase idea!Ω Model:WLT-108 · Most technically advanced, feature-packed helmet from WLT · Totally 3D engineered from the very beginning by an international design team · Hi-impact, solvent-resistant shell · Mag-Cam opening mechanism · Metal-to-metal locking system · 2mm scratch-resistant, molded anti-scratch shield · Quick removal shield system · Controllable air ventilation and cooling system · Unique single button opening system · Internal comfort lining · Meets or exceeds D.O.T. standards Comes with soft helmet bag!Full-Face Helmet Size ChartSizeCentimeterInchesHat SizeSm55-5621 1/2 - 226 7/8 - 7Md57-58 221/4 - 22 3/471/8 - 7 1/4Lg59-60 23-23 1/27 3/8 - 7 1/2 XL61-62233/4-24 1/475/8 - 73/4 XXL63-64 24 3/4-2577/8 -8