POC - Receptor Bug - Joint Helmet - Matt Blan - S (52 - 55.5 cm) - Manufacturing: molded shell Hardbody (TM) / EPS Size: In Form (TM) - S, M, L Ventilation: 16 openings Super Cool Ventilation (TM) / Setting Thermostat (TM) / weatherstrip vent plugs (TM) Audio: TuneUp system compatible (TM) wireless and all the systems I and II TuneUp