Problem with them all is the uv does them in, doesn't take long either!
Mixed reviews, this being the 'top critical' one: "Bought for my son for his new Landmann BBQ. This looks very nice and of course matches the Landmann BBQ bought BUT very disappointed as it seems so flimsy and not sure how long it is going to last. Only time will tell. I don't think the BBQ should be left with the side flaps down because if the wind comes up I am sure it will eventually tear. So Lightweight is the operative word here! I hope I am proved wrong!" That said, I got a heavy duty one from B&Q (own brand, but it was very heavy duty) and that has lasted less than two years.
Oh I see that later, still just pvc, bit like an Ikea bag. Better ones have a material outer layer. You can get material ones at this price'ish.
From the item description 130 x 110 x 60cmTough woven fabric Easy to clean & foldsflat
It appears not to be woven in any way, essentially a PVC plastic Bag. Can't see it lasting.