No, like an actual rubber strap for a watch. The first time I saw something this silly was when Hodinkee made a post about it (which was pretty much an obvious ad). I won't name the brand but it's the second link if you google "hodinkee rubber strap".
edit: Upon further research, it actually seems that a couple hundred for a rubber strap (mainly OEM replacement) is not uncommon. My bad. Nonetheless, in my opinion, I do not believe a rubber strap should cost upwards of $200. Max I would pay would be $50-$75.
I recently got an Omega watch, and wanted desperate to get the OEM rubber strap. The actual strap was $256 and the deployment buckle was an extra $256. So over $500 total. I got a great deal on the watch itself through a gray dealer and saved a ton on the watch itself so I pulled the trigger on the strap.
The buckle you can use on any strap on any omega watch which I guess is cool, but clearly super overpriced.