"The old dress code that insisted on pairing heels with certain outfits now feels outdated." Wearing comfortable, supportive shoes will also make your feet (and by extension your body) much happier.

For instance, if you have flat feet, tend to overpronate ... it’s not just about mileage when classifying a running shoe as “old.” The actual age of the shoe, in terms of time, also matters.

Got low to no arches? We've got you. Experts share what types of running shoes for flat feet you should look for, plus which ones to buy. Our editors independently select these products.