Shell design An aerodynamic shell design constructed using an advanced lightweight composite poly-alloy A clear coat finish to protect paint & graphics Ventilation 11 points of ventilation with chin, side, forehead, top & rear vent 3 intake vents & 8 exhaust vents Goggle guide on eyeport trim Goggle strap grabbers Peak A removable & adjustable (50 mm) screw-on visor Retention system Race approved Double D-Ring Weight A large-size FX-17 weighs 1.55kg or 3.42 lbs Certification This helmet model meets or exceeds both ECE 22.05 & DOT FMVSS-218 motorcycle helmet safety standards Removable, washable & custom sizeable interior The size of this helmet is based on a combination of four factors: outer shell size, inner EPS thickness, comfort liner thickness & cheek pad thickness. The fit of the helmet can be customized by replacing your existing cheek pads with thinner cheek pads (for a looser fit) or thicker cheek pads (for a tighter fit). The fit can also be customized by replacing your existing comfort liner with a thinner comfort liner (for a looser fit) or thicker comfort liner (for a tighter fit). Please refer to the shell, liner & cheek pad compatibility chart below. Keep in mind these components can only be replaced inside the group of sizes contained in each size range block. Shell & EPS Size XS/S/M L/XL/XXL 3XL/4XL XS S M L XL XXL 3XL 4XL Cheek pads (mm) 28 24 20 28 24 20 12 12 Confort-Liner (mm) 10 8 6 10 8 6 80 6 Note Please be aware, as long as nothing else is written in the item description: All helmets will be delivered only with the ECE certification by default, even if it is shown differently.