Smith helmets with Airflow Climate Control give the wearer the option to choose between different venting levels when. This is an excellent feature for days when the weather can't make up its mind. Topside vents on these helmets can be opened or closed different amounts via a switch on the back. Weather it's snowing like mad and you need the vents closed or it's a warmer day in the spring, Airflow Climate Control let's you adjust as needed.