2017-5-31 · Flannel Cotton Nel Filter by Hario $15. For luxurious, silky texture. Cloth filters, commonly used with the Hario Nel brewer, absorb oils in much the same way that paper filters do, but their woven texture results in what Brewer calls "luxurious, silky, layered cups."While cloth filters are reusable, they do need to be replaced after a few months of use.