Summary: Soles delaminated exposing hairline cracks in boot shell, and signs of dry rot.
Details: I got about 2 hours of riding out of these boots before the soles began to delaminate. They had apparently been unprofessionally resoled with the wrong adhesive. I took them to a boot cobbler to re-glue them on. The cobbler showed me the cracks and crumbly plastic underneath, and said they could not be salvaged.
I believe these were sold on consignment, so seller may not have known.