The Filter paper used for Rakura tea bags is produced by one of the top paper producers in the world using high-quality abaca and cellulose fibers to achieve excellent infusions. By using this blend of specialty fibers, a finer paper in an intricate web structure is created that enhances the rapid release of tea aroma, color, and flavor while guaranteeing high retention of fine tea particles within the bag. Similarly the alu-wire that stiches the tea bags and the tags come from the world’s leading manufacturer of aluminum wires and boast of surgical grade aluminum with a breakthrough shaving process that ensures a sterile, low oxide surface to boost it’s antimicrobial properties. What’s more? Even the spools they are wound on are food grade!