In response to vinyl on vinyl a bad idea or bad for the "fabric". Vinyl is not a fabric per se, but a plastic, hense it does not "breathe". Karla is right: damn hot, even when not layered.
In the 1960s large rubber knickers were sold as reducing devices, because they made you sweat like a whore in church. But ... served little value as either svelte makers or fashion statements (although Monty Python did a funny skit about the Classics like Wethering Heights produced while the actors wore "slim jeans"
It is also cold in cold weather. (ah, the foibles of fashion).
It does stick to itself (and your sweaty bod), and if it gets hot enough, MAY even fuse together (higher than body temperature, ususally). Tihs may be the "bad for the fabric" you've heard about.
Designers who work with the stuff use a talcum powder to keep it from sticking to itself. I do not know if that would help getting it on and off, but I would think so.
Leather is a good alternative choice for comfort and style. (I have to say that because I'm a leathersmith by trade).
