I knew the minute I tried them on they were the ones. I needed room for my toes and these shoes have it being a wide fit. The first day I had them I power walked 8K on mixed surfaces (trail and pavement) and when I got home I didn't have any desire to take them off. There are no resistance or friction points to hurt my feet. I believe the insole can be replaced as the Merrell original has a part number on it 21003EEE. Great shoes!