The Smith Descend Helmet packs the latest impact protection into a lightweight, low-profile design that lets you focus on riding more and fussing with your gear less. It combines Mips and zonal Koroyd for enhanced energy absorption in the event of a crash. From cold and stormy to warm and sunny, adjustable vents let you dial in the climate control to match the day. Audio-compatible ear pads help keep you connected, and the adjustable dial fit lets you fine-tune the fit and feel on the fly with one hand. Lightweight in-mold construction fuses the exterior shell and EPS foam for a one-piece design that&';s lightweight and durable Zonal KOROYD coverage for lightweight, energy-absorbing and ventilated impact protection Mips Brain Protection System reduces rotational forces caused by angled impacts to the head Designed for ultimate integration with Smith goggles for maximum comfort and venting AirEvac ventilation sytem integrates with Smith goggles for fog-free lenses 360 degree micro-adjustable dial fit system for easy, on-the-go-size adjustment Available in Round Contour Fit to better match rounder head shapes Regulator climate control allows easy, one-handed vent adjustment. 16 Vents Removable Snapfit SL2 ear pads add warmth and are audio-chip compatible Aleck audio systems compatible