We have a couple of Isabella chairs which I purchased at the Manchester show.
They came packed in plastic bags which are getting a bit holey and worn so I decided to purchase a couple of waterproof bags as Isabella chairs don't come cheap.
By coincidence I found a place which is local to us across the other side of Wakefield,"Bags 4 Everything":-
Bags 4 Everything
Purchased a couple of bags and they fit a treat,you will need XL for Isabella chairs,they are £12.50 per bag.
They have a draw-string closure and come in Maroon,Blue and Green.
Even though they are a local firm I have nothing to do with them at all apart from being a first time customer.