I wear these at work in a hospital environment and have for many years. They will last forever although the laces will eventually wear out but keen will usually replace them. I've actually like these so much that the pair I have recently purchased is my back-up should they possibly discontinue them. I BELIEVE I currently have the original Bostons and so far they have lasted at least 7 years. These are the Boston III. Eventually my originals will wear out? When they do, these are my back-ups.