Reflectivity - Reflective rear decals Circumfrence - 58-65 cm Construction - In-Mold polycarbonate shell with EPS liner Visor - Snap-Fit 2 visor Ventilation - 16 vents and deep internal channeling Fit System - Roc Loc Sport Product Weight - 345g (size Universal Extra Large CPSC) Certification - Complies with the US CPSC Safety Standard for Bicycle Helmet for Persons Age 5 and Older Highlights - Quick-dry padding Giro Fixture Mips II XL Helmet Mens