Facial Contour System (FCS?) adds just the right amount of support by moving out of the way when putting the helmet on. The contoured shape, combined with multiple layers of varying foam densities supported by a foam "spring", cradles the face. The spring makes on-off easier while helping to block even more wind noise. These replacement cheek pads are available in multiple thickness options to fine-tune fit and helmet comfort, delivering an improved seal, reduced wind noise and personalized support for better stability and long-ride comfort.