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 and rear vent 3 intake vents and 8 exhaust vents Goggle guide on eyeport trim Goggle strap grabbers Peak A removable and adjustable (50 mm) screw-on visor Retention system Race approved Double D-Ring Weight A large-size FX-17 weighs 1.55 kg or 3.42 lbs Certification This helmet model meets or exceeds both ECE 22.05 and DOT FMVSS-218 motorcycle helmet safety standards Removable, washable and 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 and 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 and 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