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
100% Barstow Curved Lens
UFO Forgaffelbeskyttere Sort
X-Trig Top Triple Clamp




