Is this leather salvageable? Is it even leather?

[Gabardine]

I picked up a couple of these robust chairs a few years ago, long before I had heard about this forum. The leather, at least I think it's leather, has some cracks in spots and I'm wondering if they are salvageable. I had heard that there are leather products from tack shops that might help like Bick 4 leather rejuvenator. Any ideas?