I had a pair just like this and wore them constantly for three years.  The only reason I stopped wearing them was because the color just suddenly started to bleed onto other things (like my feet).  So I ordered a new pair just like them on amazon.  But the new ones just don't feel the same--and they gave me a callous unexpectedly.  I'm still wearing them because I have them.  And they are pretty good.  Just wish they were as amazing as my last pair.