It's piece of thin felt cloth unjustifiably expensive, I paid 28 Euro fo this! It almost covers my VPC1 but it is slightly smaller on width and length so dust will still fall into the the keybed over time around the edges.
I think the retailer needs to adjust their selling prices as I feel slightly cheated by this purchase.
In hindisight I would have been better served if I had gone to a tailor and asked them to cut a cloth for me.