I love these shoes and while deployed and visiting ports you do a lot of walking or at least I do.  Well, I have arthritis in both knees and so standing for prolonged periods and walking lond distances can sometimes leave me a little stiff at the end of the day.  Well know more.  I bought my first pair of shape ups a few years back when I was taking my Girl Scout troop to Washington DC to earn their Discover our Nations Captital badge.  Well we walked and used public transportation the entire trip and one day we walked over 15 miles.  I did not have any problems with my knees, so I am sold on all their products.