These are the most comfortable flip-flops I have ever worn in. I dare not say how many years, but I'm a senior and have worn thongs since I was a small child. The sole is thick, comfortable. The fit was originally tight (I ordered .5 above my normal shoe size), but immediately stretched the little bit that was needed such that I can hardly remember being concerned. I have had these now for many months and they are just as good as the day I opened them. I recommend them very highly.