FEATURES: Shield helmet with futuristic style Hybrid hard shell and In-Mold lower shell adds protection and style Features MIPS(R) (Multi-Directional Impact Protection System) Technology for exceptional protection MIPS(R) Technology includes an interior EPS foam liner, a Low Friction liner and an elastomeric attachment system that sits between Spherical Technology Ball-and-Socket design redirects impact away from brain with rotating outer liner Polartec(R) power grid bi-component knit construction for moisture-wicking comfort In Form(TM) 2 Fit System creates a low-profile fit and stability system with 6cm of adustment Fidlock(R) one-handed magnetic buckle closure for s strong and secure locking force Stack Vent(TM) helps keeps goggles clear and fog free with integrated VIVID shield Pull shield out and over helmet for secure fit Thermostat(TM) Control Adjustable Venting lets you adjust airflow using a low-profile control button on outside of helmet Seamless compatibility with all Giro(R) goggles VIVID lens technology with ZEISS(R) optics blocks UV light and manipulates blue light for enhanced contrast and definition SIZE: S: 52-55.5 cm M: 55.5-59 cm L: 59-62.5 cm