Nexx Y.10 Sunny Liner Replacement liner for the Nexx Y.10 Sunny helmets. Liners are interchangeable within these sizes: 2Xs-Lg and Xl-2Xl. Sizing: 2Xs-Lg: Available in 16mm, 14mm, 8mm and 6mm thickness Compatible with 2Xs, XS, SM, MD and LG Xl-2Xl: Available in 8mm and 6mm thickness Compatible with XL and 2XL OEM Sizing: 2Xs: 16Mm XS: 14Mm SM: 10Mm MD: 8 MM LG: 6 MM XL: 8MM 2Xl: 6MM Note: Does not include cheek pads.