The design concept of Sibarist FAST Filter is to provide a fast and constant flow rate so the user can focus on other variables and refine their brewing recipes without worrying the effects from filter.
Fast flow rate also gives you more room to adjust on fine grind size and reach higher extraction on a short brew time.
Made with 100% organic materials.
The official FAST filter factbook is here, you can also see my personal thoughts Thoughts on Sibarist FAST Filter
The filter is 02 size, fits with Hario V60 02, Origami M and other similar size drippers.
The original pack has 25pcs, you can also choose the 5pcs sample pack if you want to try it first.