Riders will sometimes need to change the cheek pads that come installed in their helmets. Some people need a little more or less space, while others simply need to install a fresh set of pads for better comfort (and smell).
You can buy the same thickness of cheek pad if you like the fit of your helmet and just need a replacement set. Or you can buy a different thickness cheek pad to adjust fit as all the cheek pads are interchangeable