I ordered these socks originally almost four years ago.  I wear them exclusively for work, with New Balance shoes; I walk on average about 9000 steps per day, five days a week upto 8 to 9 hours a day for the last three years, nine months, the socks have finally gotten little holes in the toes.  I have to say, I have been impressed with them and how long they have lasted.  I just bought some more this week (March 2018) to start replacing the worn out ones.  The Value, quality for my use has been Grade A, Excellent.