Why shouldn’t I wash my jeans in the beginning?
In the first few weeks, the trousers will adapt to your body. The fibres relax through movement, warmth and wear – the trousers “settle in”.
If you don't wash them during this phase, they will achieve:
-a better fit
-a more stable shape, even after subsequent washes
-less tension in the fabric, because the fabric has time to settle.
In short: wear first, then wash – this is how the trousers will fit best.