I had a pair of Soloviere mountain sneakers (RASMUS) that I bought a few years ago customized with a shark sole by Additional Sole, who had a pop-up shop at Isetan. The total cost was around 100,000 yen. The upper was dyed blue-gray. The laces have been replaced with ones from Santoni mountain boots. I cherished these shoes, but my current fashion preferences have changed, so I'm offering them to someone who will appreciate them. They've only been worn a few times since the customization and are in beautiful condition.