They all look the part but I can see possible problems with the idea - unless you are a latex fan like me. The first problem is sensitivity, both for you and the guys. I have a pair of latex shorts with a sheath and its considerably thicker than a condom. Indeed it has to be because it has to cater for reuse. I don't think either you or them will get the usual sensation.
Also, if you're taking more than one there's a potential health hazard for them. Either they put their unprotected cocks in otherguy's semen, or between each of them you have to clean out the catsuit - and that's hardly conducive to a good gang bang. You'll be hot and sweaty very quickly - again OK if you're a latex fan, as it's part of the turn on but if you're not a fan of latex, you'll quickly lose interest.
Finally, there's the cost - even a cheap and nasty suit is several hundred times the cost of a condom and its a cost you are bearing, not them.
Now for a latex fetishist that's not an issue because it will get used regularly but if the sole purpose is to save them putting on a condom, then it's a bit extreme. Given that effectively the will be using a large thick condom anyway (built in) I'd make the buy their own latex shorts.
I've been quite negative there but you're doing this to get pleasure and you need to ensure that's what happens all round - so if any of the above cause issues with you then don't do it, if the are actually a turn on (and they would be for me) then enjoy yourself and send me an invite :-)