A mate of mine bought me one of those oilskin draggin jeans as an early birthday present. How are they different from your normal leather or textile pants? I just need advice on how to maintain them eg. are they washable? do i have to oil them? If so how frequently do i do it? What product would i need to use to oil it and where can i buy it from? And basically what are the dont`s and do about maintaining them? I have never owned a pair before so any help and advice would be well appreciated cheers.