Towa Sangyo's "futon dried bag" is a cover that allows you to dry the futon while protecting it from pollen and dust by inserting a futon. It seems that the air has a waterproof effect to let through. Moreover, because it is black, it absorbs solar heat efficiently, so the efficiency of extermination of ticks is improved. In addition, it is easy to put a futon with a three-way fastener. .