The thing with a well made, elegant suit or dress is that, when you look you can see how the parts go together, the workmanship in making it, the adding of resilience to the components that see the most wear and tear.
And a well made suit should stay with you for a very long time, because it is well made and strong in a lot of places, but can also be repaired or modified as you change.
The seams may not be obvious but they are certainly not invisible.