#4 Cone Reusable Coffee Filters for Pour-Over and Drip Coffee Makers. CoffeeSock are natural filters, with better flavor, that make a more reliable brew for less money than buying single-use paper filters! There's no reason not to go reusable! CoffeeSock filters are made from organic sustainably harvested cotton. Get the best for your home and for your coffee from CoffeeSock! Just place the filter like you normally would and make your coffee. Rinse the filter when you're done and let it dry out before the next use. Our eco-friendly filters are made to be zero-waste, the fabric is compostable once you're done with it.