The Smith Optics Convoy Bike Helmet w/ MIPS is a mountain bike helmet for incredible fit, comfort, and brain protection. Rip down the mountain at high speeds, with full confidence in your brain bucket. The Mips Brain Protection System reduces rotational forces, which significantly helps during angled impacts. Hopefully, you won't ever need to employ its services, but this helmet is prepared in the event of a crash. You will enjoy the constant comfort provided by the airflow of the AirEvac ventilation system, 20 fixed vents, and the performance comfort lining. Buckle under the chin, adjust the dial, and hop onto the bike.