The Masterson Sta-Wet Acrylic Paper Refill Sheets are designed to fit within the Masterson Sta-Wet Premier Palette. This proprietary paper keeps acrylics and other water-soluble paints moist and workable for days, and even weeks. The paper is permeable, cleanable, and reusable. Use this paper in combination with a Masterson Sta-Wet Sponge (not included) to provide proper moisture to the paper. Masterson Sta-Wet Acrylic Paper Refill Sheets are sold in packs of 30. Please be sure to follow all paper preparation directions provided.