My Puma walking shoes were incredibly comfortable at first, but after six months of use, they've started causing discomfort when I walk. What could have caused this change?

If, after six months, your Puma walking shoes no longer feel as comfortable as they did at first, there could be a few different reasons:

The most typical cause is normal wear and tear. Walking shoes don't last forever; after six months of consistent use, the support and cushioning may have worn down, making them less comfortable. A less supportive fit and more impact on your feet may come from materials in the shoes, such as the insoles or midsole foam, that have compressed or broken down over time.

Another possibility is that your feet have gradually changed over time. Shoes that were previously comfortable may no longer be appropriate due to factors like weight fluctuations, injuries, or changes in your arches. These factors can change the amount of support your feet require.

If the discomfort persists, you might want to get a new pair of insoles with better arch support. If that is insufficient, further cushioning may be added by placing a supportive shoe insert. A new pair of walking shoes may be necessary if the discomfort doesn't go away after making these adjustments. Walking shoes should last six months with regular use.

Feel free to contribute any further information or insights in the comments or file your complaint.