I’d be concerned going with a tango. They’re really good for simulating overmolds or other static elastomeric applications, but their tear strength is terrible. We had a small bellows made out of it, and while it worked for our purposes, it was definitely prone to tearing along the edges.
I’ve seen airtight vinyl fabric that might be able to suit your needs, but as iab said, it’s expensive (needs to be ultrasonically welded).