Specialized Dissident 2 Helmet Peak protection for descending peaks The Specialized Dissident 2 Helmet sets the standard for what a top-of-the-line downhill helmet can be, providing class-leading protection and performance for racers and ambitious riders who are fueled by the feel of gravity. The Dissident 2 features five distinct EPS foam inserts at different densities, allowing for critical protection at a reduced weight. The helmet is also constructed using lightweight carbon fiber and polycarbonate layering for a feathery feel that doesn't compromise on protection. Specialized also added MIPS Evolve Solution technology, which helps to redirect rotational forces during certain types of impacts and further protects the brain in a crash. The advanced ventilation system on the Dissident 2 uses a hood scoop, and purpose-built vents to let hot air escape through the back of the helmet, letting you ride through the hottest conditions with cool, protected confidence. Features5 distinct EPS foam sections with varying densitiesoffer peak protection at a limited weight MIPS(R) Evolve technology reduces rotational forces during certain types of impacts and is optimized for full-face helmets Optimized for maximum airflow with a helmet scoop and advanced vents to direct warm air out of the helmet Carbon fiber outer shell and a triple-layer helmet construction help to reduce weight without sacrificing protection Ionic Plus Fabric anti-microbial padding help to keep the helmet fresh and comfortable ride after ride SPECIFICATIONSClosure system D-Ring Buckle Safety Certifications U. S. CPSC (age 5 years and older)Intended Use Enduro, Downhill, Freeride Weight940g (size M)Sizing Size Small Medium Large XLHead Circumference (in)21 3/4 - 22 1/2"22 1/2 - 23 1/4"22 3/4 - 23 1/2"23 1/2 - 24 1/2"Head Circumference (cm)55 - 57cm57 - 59cm58 - 60cm60 - 62cm | Specialized | Dissident 2 Helmet Cpsc Men's | Size Extra Large In Black