Simple yet effective. The RBK 4K helmet features a dual density VN Pro Pattern liner for great protection and comfort. The FitClip permits easy adjustment and the Max Vents allow for increased air flow. This helmet comes with a FM5K black facemask which features a thin straight bar design, ergonomic chin cup, wireguard to protect your chin from abrasion, and a safety strap to lock the facemask in place.