Smith Triad MIPS Helmet Advanced protection for every rider The Smith Triad MIPS Helmet is an advanced helmet that offers comfortable, high-tech protection to riders of every discipline and skill level. The Triad MIPS uses Smith's KOROYD(R) technology, a honeycomb-like layer that adds impact absorption in a lightweight and breathable design. Adding to that protection is the famous MIPS(R) technology, a slip-plane design that acts to reduce rotational forces during certain types of angled impacts. Pair all of that protection with a whopping 19 vents and an Air Evac(TM) ventilation system that increases airflow and reduces fogging of Smith performance eyewear. The Vapor Fit(TM) dial provides 270 degrees of fit adjustment, and lightweight, low-bulk webbing with a Y-strap divider keeps the helmet straps comfortably laying flat no matter where the ride takes you. Features Zonal KOROYD(R) coverage offers lightweight and ventilated impact protection MIPS(R) Technology helps to reduce rotational forces on the brain during certain types of impacts19 vents for consistent airflow Air Evac(TM) ventilation system enhances airflow and works flawlessly with Smith performance eyewear to reduce fogging Integrated sunglasses storage makes it easy to stow away sunglasses mid-ride Vapor Fit(TM) adjustment dial provides 270 degrees of effortless fit adjustment Lightweight, low-bulk webbing with a Y-strap divider makes the helmet straps significantly more comfortable IONIC+(R) antimicrobial padding to keep the funk at bay SPECIFICATIONSClosure system Vapor Fit(TM) dial Intended Use Road, Trail Weight290g (Size M)Sizing Size Small Medium Large Head Circumference (cm)51 - 55cm55 - 59cm59 - 62cm | Smith | Triad Mips Helmet Men's | Size Extra Large In Matte Black