I have recently bought a pair of Paramo salopettes for winter/alpine climbing/walking and, in the blurb, it says there is the ability to take a dump without taking them off, even if wearing a climbing harness. Something about a 'drop seat'.
Now, I've seen some salopettes with a long zip that goes all the way underneath, and salopettes with a curved zip at the back and it's fairly obvious to me how they operate. However, for salopettes which don't have either of those features, but do have side zips, how the hell is it supposed to work?
I guess this sort of info would be useful to anyone using salopettes - especially when tied in - but, frankly, no-one seems to put instructions with their kit anymore and there don't seem to be any pictures or videos anywhere either... although I'm not that keen to see what happens once you have got your pants down!
You're my only hope as customer services everywhere don't seem to be able to explain it or just say "It's obvious when you put them on". Well, I have them on and it isn't bloody obvious!
For some reason books and magazines never seem to cover going to the toilet, and it’s only when you have to go for the first time when you’re wearing a harness that you realize why gear’s designed the way it is (or what a bummer it is when it isn’t). Things like removable leg loops, easily releasable rear risers, fly zippers that can be zipped both ways and the design of your trousers all come into play.
There was a funny backwards and forwards of trouser design between me and Steve House a few years ago, beginning with this article (response here).
If you have a pair of standard over trousers with full size zips (or 1/4 length zips), then you can either undo one leg loop and rear risers, then unzip one side of the salos/trousers and pull the fabric across to bare your arse. The other option is to undo the rear risers and unzip both zipper down to your leg loop and squat down (make sure you pull the fabric between your legs as well as your rear risers! When squatting there, just take a moment to think of that story about Chris Bonington having a dump in the hood of his down suit!
If you need to take your harness off completely, then you can larks foot a sling around your chest (larks foot it once, then pass the sling around and through one more time, so the sling is locked).
One of the best systems for dumping is the through the legs zipper, so you can have a crap without taking off your legs loops, making it super fast (at the moment you can only see this on Buffalo Salopettes). The other system is the rainbow drop seat, which is somewhere between the two, but does add extra bulk to the back of your pants.
Anyway hope that helps - and maybe you should practice it in your garden!