The Bern Macon MIPS is an excellent helmet certified for all season use for all types of outdoor activities. Bern's Thin Shell Construction and Sink Fit give you a very low profile and sleek look. A BOA Fit System gives you a perfect fit by adjusting the dial. 13 Radial Vents keep air moving through the helmet and prevent you from overheating regardless of the time of the year or the sport you are doing. MIPS (Multi-Directional Impact Protection System), Bern Profile, Sink Fit, 13 Radial Vents, Thin Shell Construction, Compatible with Outdoor Tech Audio Systems, Certifications: CPSC/EN 1077B/EN 1078, Warranty: One Year, Race: No, Category: Half Shell, Audio: Audio Compatible, Brim/Visor: No, Ventilation: Fixed, Adjustability: Full, Year Round Capable: Yes, Shell Construction: Hard Shell, Model Year: 2019, Product ID: 544221, Model Number: SM02M18MGR1, GTIN: 0843990095669