BELL 4FORTY MIPS HELMETMountain biking is a demanding sport - compromises and shortcuts when it comes to gear are never a good idea. The 4Forty is built to withstand the rigors of a trail riding life; with generous ventilation, the comfort of Float Fit and built-in Sweat Guide, extended rear coverage, a full hard-shell, and adjustable visor. Boasting the comfort, protection and capable features of helmets costing twice as much, the 4Forty is an all-conditions, all-kinds of trail champion. Features Float Fit(TM)Fusion In-Mold Polycarbonate Shell Goggleguide(TM) Adjustable Visor System No-Twist Tri-Glides(TM)Sweat Guide(TM) Padding SPECIFICATIONSShell Material Polycarbonate Core Material EPS foam Vents15Safety Certifications CPSC, CE EN1078Intended Use XC mountain, trail Weight380GSizing How to Measure: With a cloth measuring tape, find your heads circumference just above the ears. Helmet Size Small Medium Large Extra Large Head Circumference20"-22"52cm-56cm21. 6"-23. 2"55cm-59cm22. 8"-24. 4"58cm-62cm24"-25. 6"61cm-65cm | Bell | 4Forty Mips Helmet Men's | Size Large In Black