The New FAST SF is Ops-Core' s lightest weight ballistic helmet system yet. This weight reduction is enabled by the introduction of three new subsystems: the next-generation FAST SF ballistic shell, the LockDown Liner, and the Head-Loc Flex chinstrap. FeaturesBallistic protection from 9mm rounds (1200 f/s) with a shell weight of just 1.23 lbs/557 g (Size L) the FAST SF offers the same level of ballistic protection as its predecessor but with a 10% reduction in overall system weight.LockDown Liner System incorporates a user-customizable suspension system with multiple strategically placed pads, enouraging airflow. The LockDown Comfort Liner, featuring moisture-wicking fabric and reticulated foam, offers adaptable density for diverse head shapes and comfortably supports heavy VAS and NVG systems.LockDown conformable nape pad and cable Occ-Dial offer enhanced stability, securing a larger contact area on the rear of the user' s head, adapting to individual contours for an improved fit c...