Icon Airmada Helmet Liner Features: Replacement Hydradry liner for the Airmada Full Face Helmet Moisture wicking for ultimate comfort Replacement liners fit only the helmet sizes listed below: 2XS 12Mm fits 2XS helmets XS 12Mm fits Xs-Sm helmets SM 9MM fits Xs-Sm helmets MD 12Mm fits MD helmets LG 12Mm fits LG helmets XL 12Mm fits Xl-3Xl helmets 2XL 9MM fits Xl-3Xl helmets 3XL 7MM fits Xl-3Xl helmets