I can not confirm that one hardly gets air after a gestation period. Of course, such as free breathing without mask is not possible, but I felt the resistance as not very strong. The mask itself is "maintenance free", which means that the filter can not be replaced. So it is more of a disposable item, what's the biggest gripe for me. You pay namely a few more euros, you already have a reusable mask, which can be used permanently. For this you can look at the 6000 series of 3M. I would still use this mask here several times, as long as I do not just have asbestos work in front of me.