These are very comfortable right out of the box. The thong is a bit thick and it may take a day to get used to that, but the foot bed is shaped to support human feet and it's thick enough to absorb shock. The sole has great traction on both sides, so no need to worry about slipping. I wear a 7.5 so bought an 8. The sole is a bit long, as to be expected, but the shoe nevertheless fits securely. Overall, great value.