It's not my first pair. I wear them at work (construction site) and for everyday activities (in a second pair) since 2012. Endless kilometers. I change them when the soles wear out. And from what I've learned, they are replaceable. Obviously, I am satisfied. Heavy but comfortable, warm and durable. Hard and inflexible sole. They need basic care from mud and water. I highly recommend them to those who don't have an issue with their weight and rigid sole. Always AKU.