The problem with these chemicals is that they very easily penetrate through your skin straight into the blood. [1] (Their super low molecular weight might be the reason for that.)

So even your jacket may be a significant route of exposure, too.

[1] Dermal Penetration Potential of Perfluorooctanoic Acid (PFOA) in Human and Mouse Skin http://www.tandfonline.com/doi/abs/10.1080/15287394.2011.615...