Thank you for viewing! (o^^o) The skin-facing side is a soft, fluffy material like felt. The back side uses waterproof fabric throughout. It's a size that provides peace of mind even on heavy flow nights. ※Some products have increased in price due to rising purchase costs. (Full waterproof, for heavy flow days, for light flow days, for panty liners, for urinary leakage, cloth liners, period panties, warming, night use)