I recently purchased some engineer boots, and I wanted some bulkier socks to wear with them.  I decided on these because I'm partial to wool socks, and because they appeared to be bulky.  And the price was right.  They aren't as bulky as I had hoped, but they are adequate to the task.  They are very comfortable; they fit just right, they don't ball up in the boots, and they wash very well.  After washing, they look brand new again, and they don't shrink.