The Smith Mirage MIPS Helmet features all the comfort we need for long days taking laps, with adjustable venting and a lightweight in-mold construction. The Multi-directional Impact Protection System (MIPS) helps reduce rotational forces that occur during an oblique impact, and Smith's Aerocore construction combines traditional EPS foam with proprietary Koroyd in order to increase impact resistance and improve airflow. A dial-fit system makes it easy to micro-adjust the fit-even with a gloved hand-while a cozy liner keeps us warm against the howling wind. The snap-in earpieces are audio-compatible, should we desire tunes while we ride, and they can easily be removed when the days are warm.