I finally wore these boots for more than an hour.  4 hours later my ankles were killing me.  The "plastic" or whatever is holding up the rest of the boot around the ankle area DUG into my ankles.  I felt the pain at about the 1 hour and half point.  I tried to keep the plastic away from my ankle by pulling it up or putting my hand inside the boot and shoving it out.  By the time the 4 hour hike was complete my ankles were in so much pain from being rubbed raw and I had thick knee high socks on.