TH-1 Aroma and Clean Drink - Thickness-1: Thickness 0.15mm - Density: High - Single-Sided Crepe (Inner side uncrepeed, outer side crepeed) TH-1 Structure: The inner side of the paper is not crepeed, thus the inner surface area is quite small. Coffee grounds adhere to this area, leaving a small amount of space for water to flow and allowing the water to concentrate within the paper. This concentration of water within the paper releases a significant amount of aroma. Thanks to the crepe on the outer side, the dissolved coffee in the water flows out in a regular stream. The high paper density separates almost all ground particles, resulting in a clean-drinking cup.