After more than 20 years, I'm still wearing a pair of 14" calked pack boots that I had Hoffman convert to standard lug-sole units about 10 years ago. They've never leaked and show no sign of wearing out. I also still wear a pair of their 8" fire boots after using them for several seasons of western fire work. A local cobbler has re-soled them twice. Again...No indications of wearing out even though they're over 12 years old and I wear them constantly for trail maintenance in Vermont. These people make great boots and they bend over backwards to service them as well. They obviously have a lot of pride in their products, and it shows.