The Smith Mission is a fantastic helmet for snow riders looking for a lightweight helmet that will not break the bank. The Lightweight In-Mold Construction is made with Aerocore and Koroyd that can absorb energy should you take a hard spill. The DFS2 Adjustable Fit System uses a dial located on the back of the helmet that helps you get a secure and comfortable fit with the simple twist of a dial. The Regulator Adjustable Climate Control allows you to control the airflow through 14 Vents with the AirEvac2 Ventilation which pulls the warm, moist air out through the back of the Mission while having cool, fresh air coming in through the front to prevent you from overheating on the mountain, even on those spring days. In-Mold Construction, Aerocore Featuring Koroyd, Regulator Adjustable Climate Control, 14 Vents, DFS2 Adjustable Fit System, Snapfit SL Ear Pads, AirEvac 2 Ventilation, Compatible with Outdoor Tech Audio Systems, Certifications: ASTM F 2040 / CE EN 1077, Warranty: One Year, Race: No, Category: Half Shell, Audio: Audio Compatible, Brim/Visor: No, Ventilation: Adjustable, Adjustability: Full, Year Round Capable: No, Shell Construction: In-Mold, Model Year: 2019, Product ID: 531018, Model Number: H19-MSFHMD, GTIN: 0715757577070