This latest version of the Stilo ST5 FN Zero helmet is designed to pass the FIA 8860-2018 ABP (Advanced Ballistic Protection) standard, making it the highest safety specification helmet available. This 'Zero' version is constructed from high tensile autoclaved carbon fibre for exceptional strength and ultra-light weight and includes a reinforced section above the visor port. This removes the requirement for an additional Zylon visor panel.Electronics and side ports deleted for optimum weight saving Earmuffs: Certified for track use as they offer excellent isolation from external noises. They are removable and not fitted with speakers, which are not permitted on circuit: communication is always carried out through ear plugs (available separately). The pressure on the head from the earmuffs can be adjusted by changing the special foam rubber pads (supplied) positioned between the earmuff and the helmet. Double Shell: Two different shells: one for small sizes (XS, S, M and L-59) and one f