Head pad module for the Shoei X-SPR Pro can be used to replace the original module or for individual customization.
By replacing the neck pad from the original size S9 with the optional, thicker size S13, you can specifically adjust the fit of the helmet at this point to your individual head shape or personal preferences.
The size of the original module can be found on its back. You can also find it by looking at the size designation of your X-SPR Pro.