discrete office chair protection?

I'm having a hard time finding the right protection during the day...
and have had a few episodes of small leaks onto my chair.
at home i use just a regular (disposable underpad) but i share an office with people (although i'm usually there alone) so I don't want it to be obvious that the pad i'm using is for incontinence protection. But leaking on my chair is not good either.

Are there any products that are more discrete?

[schoppy]

You can find a nice looking chair pad at:

http://urincontrol.com/padb.htm

They only cost $10.99 each and they look good.