Best way to protect iPad back with the smart cover on?

I have a list of smart cover compatible cases here:

https://forums.macrumors.com/threads/1139927/

back skins you apply to the back work great, if you just want scratch protection.

Best Skins Ever skin are great.

Gelaskins are fantastic.

There are a ton of custom iPad 2 cases you can buy with your favorite sports team on the back. Click through the link below and go to the "smart cover compatible" section to view them. Currently there are a lot of sports teams but there is soon to be a little bit of everything