When beery breath is just a bit too much.
I have an Ultra Light Exped mat and the years of blowing it up by mouth has left the inside looking a bit like a science experiment. A challenging looking growth of all sorts of critters and vegetables have set up house in it.
The use of a Schnozzle Pump would have pretty well made that impossible. I guess that's why I use and abuse all the gear on the website. Now I know what not to do!
Use it as a super light dry bag or bag liner when it is not pressed (sorry couldn't resist the pun) into service as a pump.
I can fill a Ultralight 7M Mattress with two bags full! So quick and easy.