A firm heel counter locks your foot in place and reduces slip that leads to blisters. Combined with a padded collar, it improves stability on long sidewalk stretches.
Midsole foam density should feel soft on impact but not mushy. Too soft collapses under load, while a balanced foam returns energy and protects joints over many miles.
Check the outsole for durable rubber in high-wear zones and enough tread for your city or commute. The right grip keeps comfort paired with confidence on wet pavement.