I purchased these boots for my 20 year old son before he went on a two week trip to France.  He said these were comfortable right out of the box, and he never had an adjustment or break in period.  He works at Fed-Ex and has a very physically demanding job where he is on his feet all day.  He says these are the best work boots he has ever had, and make a huge difference in his comfort level.  I wish they made these for women!