The K2 Moxie Helmet is a 2 season helmet. You can remove the ear liner for sports off the hill. In-molded penetration shield adds another layer of protection in the vent area. The Matrix slider design opens and closes vents with limited travel enabling a clean and compact appearance. Integrated helmet and goggle system allows goggle straps to clip to the side of the K2 Moxie helmet which allows you to precisely adjust the fit exactly to your facial features.