Nexx Y.100R Liner Replacement liner for the Nexx Y.100R helmets. Liners are interchangeable within these sizes: XS, Sm-Md and Lg-2Xl. Sizing: XS: Available in 14mm thickness Compatible with XS Sm-Md: Available in 14mm and 10mm thickness Compatible with SM and MD Lg-2Xl: Available in 14mm 10mm and 8mm thickness Compatible with LG, XL and 2XL OEM Sizing: XS: 14Mm SM: 14Mm MD: 10Mm LG: 14Mm XL: 10Mm 2Xl: 8MM Note: Does not include cheek pads.