I was looking for something to put in my TOMS since I wear a pair to work most days.  (Without socks, and I have stinky feet).  These seemed great at first, but after about 2 weeks, they started to develop a crack along the center.  Shortly thereafter they actually cracked and since I wasn't interested in having slivers in my feet I threw them away.  They might work fine in a very rigid shoe, but not in my TOMS.