In old days, people thought any futon was good as long as they could sleep. But now people want better futons. Today, people like a futon which they can relax on and recover from fatigue. Futon makers have developed futons that can adjust to the human body. This is called "Seiatsu Futon" in Japan. There is some advantages to this new type of futon. Since ventilation is good, they are cool in summer and warm in winter. Since it can adjust to ideal posture when you sleep, it improves blood circulation while sleeping. And they are easy to look after. Also a futon of "low repulsion" is popular among Japanese people. This is said to fit the body of the user. Some users who are troubled by bedbugs on futon like "tick guard" futons.