First of all, I bought these shoes here on Amazon for 35.00 and they are at least 45.00 on sale everywhere else, actually closer to 54.00! I walk a lot for exercise and because I'd put on a few pounds my knees had started to bother me. Whenever I sit for a long period of time and get up my knees are stiff and they hurt a bit until I get them warmed up. These shoes have REALLY helped to eliminate my knee pain. As I loose the extra weight I know that my knees will return to their normal way of feeling but until I get there, these shoes are the answer! Even though they are "Running" shoes they are very cushy in a great way and they are as light as a feather! Sketchers once upon a time was all about "Cute" shoes but they have really done their homework and can stand toe to toe with any of the other athletic shoe companies. I have Reeboks, New Balance, Avia's and many other pairs of shoes to workout in but these are THE BEST by far! I have since purchased another pair of Sketchers that are labeled their "Fitness" shoe. They have many different styles. I will use those for my outdoor walks and these for my treadmill walks! I LOVEEEEEEEEEEE these shoes, really! The black and whites ones tend to be less expensive because the colored ones are more in demand. Most of my workout gear is black, grey or white so these work fine for me. I'm a person who is price driven...lol!!!