I have worn through two pair of these Hi-Tec before. They were very comfortable. The third pair I bought on Amazon were not the same quality. The first pairs were made in China. The third pair was made in Indonesia. The material was inferior quality and they were not comfortable at all. I believe some chemical in the material was off gassing and causing foot irritation. They also developed a loud squeak from the inner sole and would not go away.  I will not buy these again.