The ST5 FN Zero ABP helmet was designed for open wheel racing such as F1 and comes in a full range of sizes. This helmet takes our 8860 helmet to the next level, by adding extra protection to the forehead and chin bar areas to exceed the ABP rating. The ST5 FN Zero helmet was designed for top level racing where every ounce matters. The FN (Formula Naked) helmet line was designed for open cockpit environments and features an aerodynamic design, while still offering an array of features making it the go-to helmet for racing professionals. Enhanced ABP (advanced ballistic protection) rating includes additional protection to the forehead and front section of the helmet and requires a smaller visor in comparison to our normal ST5 line. Improvements also have been made to the interior design with removable cheek & top pads allowing drivers to obtain the perfect fit. Helmets come standard with removable earmuff cushions which provide a significantly quieter environment for the driver by isolating the ear. Other Features: All Stilo closed faced helmets come in two separate shell sizes allowing us to craft a better fitting helmet that is lighter weight. Ready for non-integrated electronics, air supply, and hydration or any combination of the three this helmet is one of the top helmets on the IMSA grid. Hans Post Pre-installed Comes with Stilo Helmet & Hans Bag Additional accessories available such as aero, top air kits, and an array of visor options.