Here we go with the knees before and after the wash. This is the front. Three things are very clear. For one the stretching in the knees after 6 months of wear. The second thing is the colouration after the wash and thirdly there's the shinyness of the jeans, on the left, after 6 months of wear.
I love the way the folds are so clear on the left, but after the wash they're just marks on the denim. It's why I do these tests.