Engineered for performance, the Chapter Collection integrates elevated utility into your daily riding uniform to always keep you moving forward.° Integrated Mips Safety System for added protection against rotational forces° 30 lumen magnetic taillight with 1 hr runtime solid, 2 hrs flash° Multi-use adapter to attach the taillight to your bike° Visors in premium finishes to increase your field of vision° Secret PopLock for securing your bike helmet with your lock° Integrated dial fit system for precise adjustments° One-handed magnetic fastener and nylon straps° Active ventilation with 8 vents and internal channeling° Lightweight helmet at 360g (S), 370g (M), or 410g (L)° Matte black shell with all-black details° Complies with U.S. CPSC Safety Standard for Bicycle Helmets for Persons Age 5 and Older° Certified for CE and CPSC standards for cycling