The reigning king of full-face helmets, the D4 range expands with a Polyacrylite model packing the same safety and comfort features as the premium carbon and composite models into a price-conscious shell. Details make the D4 the most coveted full-face in mountain biking, including Mips C2 brain protection, an air intake system for ventilation, and an unmatched anatomical fit.Mips C2 system and advanced Polyacrylite shell for rotational impact protectionFront air intake with high-flow polymer center and power grid mesh for ventilationCollarbone Suspension System and breakaway visor screws for added safetyAnti-microbial padding and quick-release 3D cheek pads for optimized anatomical fitItem SpecificationsColorLiinear BlackDefined ColorBlackGender/AgeAdultHelmet CertificationsComplies with the U.S. CPSC Safety Standard for Bicycle Helmets for Persons Age 5 and OlderHelmet StyleFull FaceMaximum Head Circumference59Minimum Head Circumference58Multi ImpactYesRotational ProtectionYesSizeLargeVisor IncludedYes Troy Lee Designs D4 Polyacrylite Helmet Helmets UPC: 887202495694