An outdoor lounge cover.
Because sometimes you have uninvited guests.
One metre of clear PVC (table top protector) trimmed with bias binding, all the way around. Leave long ties of bias binding at the corners for tying to the lounge.
Shortcut: Sandwich the plastic between two pieces of bias binding (one on top, and one on the bottom) and stitch all three together with one long run of full width zig zag.
Dr Livingtsone, the black cat (who first made an appearance here) is on that lounge 9 out of 10 mornings. He approves.