According to Snopes: Often the little penguins are far too ill to be bathed right away, and scrubbing can be quite stressful. The solution is to slip the oil-coated birds into wool sweaters, which prevent them from preening themselves and possible swallowing toxic petroleum-based oil as they regain needed strength, and keep them warm until their bodies are once again producing the natural oils (removed by the cleaning) necessary to their insulation.
No seriously. If Snopes says it's real... You gotta BELIEVE in the Power of the Penguins!
So get to it! Here's a link to a penguin sweater knitting pattern (from Skeinz)
How can you say no to a penguin in a tuxedo sweater!!??? via / via Andy!