I'm sure Apple sells adequate covers for this purpose but I did not want to spend money on it, so I checked my fabric stash and found a piece of of oilcloth (with owls) which seemed perfect to keep poolside humidity away from the Ipad.
I measured the Ipad and quickly drafted a simple pattern (available for download at the bottom of this post).
For the lining I used a thick quilt-like with fabric which helps shock proofing the cover. In case you don't have anything like it and want to make a cover too just use regular fabric and batting. You will have to sew three layers instead of one but the final result is the same. Oh, and oilcloth is not very easy to sew. I got it right on my third try after checking for some advice online, so Google it first if you have never sewn with oilcloth before.
To make your own Ipad cover you will need exterior and lining fabric (or lining + batting). I also
used a large button to keep the cover closed but a snap or even velcro would work just fine too if you don't want to sew a button hole.
I did not make a full tutorial this time because the way to sew the Ipad cover is exactly the same as the clutch/messenger bag I posted a while ago, so please check that tutorial and if you still have questions please let me know.
The cover was sized to fit my Ipad2 exactly but if you have a different model or if you have doubts about the fit, print and set up the pattern and check the size before cutting your fabric.
Here is the pattern.
My Ipad cover was featured at