I've just received a vintage skinsuit I bought off ebay. It is exactly what I wanted except it has a Chamois leather pad. I have never ridden with this type of padding. I have had plenty of other shorts with a foam padding and some of them have seen better days so I wear them to commute; my newer shorts are saved for the weekend when I am doing +50km.
It is a bit too cold to be wearing my new old suit on its own yet so I wondered whether it is going to feel 'hard' on the back side over a long ride if I am used to foam pads?
It would not be impossible to replace with a foam pad but that would be a lot of fuss.
I've heard they also need to be 'fed' although this one is very flexible.