Material: Polypropylene (PP) and Polyethylene (PE) Counts: 50 / Pack Limited Quantity Q&A: Q1: Why can't non-woven filter paper be soaked in water? Because it's a composite non-woven fabric material developed specifically for the molecular density of coffee liquid, it has a special hydrophobic layer. Water without coffee grounds won't soak the filter paper. This filter paper doesn't need to be wetted; you can brew directly. Q2: Why does brewing with non-woven filter paper produce oily flavor? Because non-woven filter paper has a lower density than regular filter paper, it retains oils and fats during filtration and reduces the amount of grounds that end up in the coffee pot. Brewing with non-woven filter paper results in a smoother, fuller taste than with regular filter paper. Q3: Why doesn't non-woven filter paper fit the filter cup well? Because it has a special hydrophobic layer, it can't be soaked with regular water. Before use, simply place the filter paper in the filter cup and gently press it down to create a crease according to the size of the cup to ensure it fits snugly.