Ialso have a white fizik arione. Picked it up at the T-Town bike swap last october not knowing what bike it would go on. For $10, I couldnt' say no to it. I rode it for about two months on a bike and only one pair of jeans rubbed off on it. It took on a slightly blueish color but nothing as bad as that bike in the snow. My newer pair of jeans didnt' rub off onto it and actually held rub off some of the color left by my older pair of jeans. This isn't a new saddle and the center strip of microtex had actually worn down to a foggy silver color (not sure if it started out as silver). It didn't take on any of the blue.

I normally ride a black arione. It hasn't taken on color from any pants or shorts. I have wipped it down a few times with some Dr. Bronners or Simply Green and discovered that it is actually pretty dirty.