CHRISTINA F, thank you very much for your kind words.
THE CAT, thank you so much for you comment and compliments. Yes, I wear them but when it is not wet outside, but sunny and dry . I live in Belgrade, Serbia and sometimes we have real winter with snow and ice but can be without, like last winter. I have white jeans of different thickness. If they are not warm enough I wear hosiery (for example 40 den). To keep them white just wash them, no other strategies.