Comfortable and flexable.  I work as a nurse and only wear ASICS.  When I went to my foot Dr due to swelling in one foot (turned out to be arthritis from a broken foot when I was a teenager) he highly recommended ASICS.  Many of my coworkers wear them.  12-16 hr shifts on your feet are definitely no fun but my feet feel great with these shoes and Im near 60 and have worked as a nurse for 30 years.  I will continue to buy them and recommend them.