Slower flow rate to ensure better extraction for light roast coffee.
There is no crepe on the inside of paper, so the inside surface area is small. Coffee fine will attach within this small area, and water is "trapped" inside the paper filter, the water level will also rise up. By building up water, plenty of aroma comes out. Further more, thanks to the crepe on the outside of paper, the coffee liquid came outside flows smoothly.
Because of the high density of this paper filter, almost all fine powder is removed perfectly. You can get a clean cup of coffee.
1 Cup size for Hario V60 01, Hakka-Life Six Ridges, Sakura Dripper, Origami S and other similar size drippers.
4 Cups size for Flower Dripper M, Hario V60 02, Origami M, Loveramics dripper and other similar size drippers.
1 Cup size 40pcs per box; 4 Cups size - 100 pcs per bag
See here for using experience