Kalita # 4 Professional Filters
Kalita makes four different grades of paper filters, and these are the top of the line. The Kohiyasan 'Coffee Shop' line is the cleanest, heaviest paper filter we've ever encountered in the popular "truncated cone" shape.
These are 17% heavier than Melitta and 24% heavier than Filtropa, while still being the cleanest paper filter we've found.
The heavier paper promotes a slower brew-flow, encouraging better extraction and ultimately a sweeter, well-developed brew. The quality of the paper is such that without a pre-rinse, these filters impart less paper-filter taste than most filters WITH a pre-rinse.