Jonah Mercer is a footwear industry journalist with a BA in History from University of Michigan and a decade covering heritage brands, trade shows, and manufacturing shifts. He spent five years reporting on factory practices in León, Mexico, and Porto, Portugal, conducting over 60 primary interviews with makers and tannery owners. Jonah's investigative pieces include patent analyses (welt machines and sole adhesives), comparative lab test summaries, and retailer sourcing guides. He provides measured product comparisons, cites manufacturer specs and maker interviews, and publishes firsthand product tests-breaking in, sole wear maps, and fit adjustments-aimed at informed consumers and independent retailers.