HJC I90 Helmet Size:S The Mountain Lab Helmet Speaker

The Mountain Lab Helmet Speaker System is designed for sledders

Removable liner - FXR Thermal Dry™ active liner with 175g Thermal Flex™ fill

Extreme temperature resilience: BIONIC-10 CARBON knee brace performs at temperatures as low as -20°C (-4°F)

with no tools required

10R Motorcycle Bluetooth Communication System

HJC I90 Helmet Size:S The Mountain Lab Helmet SpeakerHJC I90 Helmet Features Lightweight polycarbonate composite shell Aerodynamic advanced CAD shape with enlarged eye port for +10mm greater visibility Upgraded center one touch open close locking system ACS Advanced Channeling Ventilation System with seven intake vents and two exhaust venturi vents at the rear spoiler Chin bar vent flows air across the face shield to help eliminate shield fogging SuperCool moisture wicking interior uses advanced anti