I wear mine every day, except at the height of summer, so I usually wear out the soles long before the uppers. A pair usually lasts me about two years, and then I send Dr. Martens a picture of the old boots with the tongues cut out, and they send me a new pair.I bought a pair of Docs (11 hole...) in the mid-1980s. If it hadn't been for the fire in 2017 I would still have that pair. Granted I don't wear them every day, but at the beginning they were worn a lot. Amazing what some dubbing and polish can do for good leather.