While never washing your jeans could result in them carrying an unpleasant whiff, a good rule of thumb is to wait and wash them after at least five wears – assuming of course you haven’t spilt anything particularly nasty on them over the course of these wears. One possible exception to this rule is the particularly skinny varieties of women’s jeans that have become popular in recent years. These jeans tend to be made of fabric mixes that can lose their form when worn. In order to keep them tight these should be watched more regularly and at least once each week.
When it comes to popping your denim in the washing machine make sure you turn them inside out to reduce wear and tear and never run them through the tumble dryer as this can impact their fit.