Manufacturer's Description: Feature rich yet Ultra-light, the Lid is an incredibly versatile helmet everywhere on the mountain. A minimalist masterpiece without any additional weight. ACT multi-shell In-Mold construction with overlapping Polycarbonate shells over the ears keeps it light and strong. Level 1 direct venting. The RCS fit system micro-adjusts for the perfect fit. Audio ready featuring our detachable Ear Covers.