Back in '09 I figured out how to fold the tongue on my LL Bean Rubber Mocs as seen in the The Official Preppy Handbook. However, I noticed a few months ago that the tongue was beginning to unfold. And since I wear my mocs all year around (rain or shine), I decided to refold the tongue and document the process (DIY style).
The folded tongue as seen in The Official Preppy Handbook
Start by wrapping rubber bands around the tongue and the toe.
Run the tongue under water for a minute or two.
Let the Mocs dry