DLP Tactical ImpaX Pro Bump Helmet Lightweight, non-ballistic bump helmet in mil-spec MICH / ACH pattern Excellent alternative to heavier armored armored helmets when bullet resistance is not needed, for extreme sports, or for training/ simulation. Heavy duty nylon fiber shell exceeds ANSI requirements for impact protection. Ventilation holes provide additional comfort and serve as lash points for optional DLP Tactical Helmet Bungee Gear Retention System (not included) Adjustable Worm Dial Liner fits provides a perfect fit no matter what your skull size and shape; impact pads provide maximum impact protection without sacrificing comfort Molded in NVG amount allows the use of helmet mounted Night Vision Goggle, camera, or lights; Side ARC rails allow attachment of virtually any other helmet mounted accessories