The midsole had been worn all the way through the rubber. Damn.
Due to the level of grime on these shoes I went hard at them with detergent using an old toothbrush to clean the nylon and suede. I don’t usually recommend doing this with vintage sneakers but this case needed the next level of cleaning so I threw them in the washer machine. (Don’t try that at home if you care about your old school sneakers. Instead I recommend taking them to Jason Markk for cleaning.)
Here are some photos of the cleaning process. I removed the laces and let them soak in a mixture of water and detergent then I threw them into the washer machine with the sneakers. The washer machine removed a lot of the soot and brought out the color when they sun dried...