I used the same manufacturer's products for about 10 years, but since filters are also cleanable, I used two alternately. Since the whole was old, I was planning to replace it so I bought it with 10% campaign. The feeling of use is very good. First of all, the fit is very good with the improvement of the band. Also, resistance of intake and exhaust is easier than previous one. Furthermore, since the dust collection area is large, it can be used for a long time, so I think that it is more hygienically better to replace it without cleaning it.