Lightweight in-mold construction Aerocore construction featuring Koroyd Regulator adjustable climate control 14 vents *MIPS system available in select colors Adjustable dial fit system Snapfit SL2 earpads AirEvac2 ventilation Weight (Size M, Non-MIPS) 16oz / 450 grams Weight (Size M, MIPS) 16oz / 450 grams Certification: ASTM F 2040, CE EN 1077:2007 CLASS B Outdoor Tech™ audio systems available LIFETIME WARRANTY