Skierchickie,
Thank you so much, I tried the simple green magic eraser and goo gone after my earlier post and it faded it but didn't really remove it. I am gonna give the shout gel a whirl like you said. It is synthetic leather, the bontrager wsd rl inform.
Like you at my first stop about 17 miles in I noticed it but thought it would wash off. Hahaha, no such luck. My husband has a similiar seat and has never had a problem. Learned my lesson with cheap clothes..never again.

Thanks to everyone else for the ideas!