Hand-brewed coffee brewing method | Why do Japanese brewers prefer to use flannel to brew coffee? What are the flavor characteristics of flannel coffee?

Speaking of flannel filter cloth, many friends may have only seen and heard about Japanese brewing introduced by some Japanese movies and TV series or bloggers, and have not actually come into contact with it. Because compared to filter cloth, most people use filter paper and filter cups, which are the mainstream filter tools when brewing coffee. How to understand flannel filter cloth