S/M comfort liner is for the medium shell sizes.
This bridge the gap from the XS/S helmet shell to the M/L helmet shell. But they only fit the M/L shells. So it tightens the fit on the Medium for someone that the Small is too tight, and the Medium is too loose.

Arai MX-V Stars & Stripes Motocross hjelm
Vertex Top End Piston Kit 46,96mm
Arai Black
Arai White
Moto Pro Roter Bolt Kit F/R




