Purchased these in the belief they were "comfort" thong sandals.  WRONG.  They are very hard, non flexible plastic all around.  I did not return them as decided I'll still wear them this summer, but NOT very often.  Save your $$ and purchase Old Navy $5 flip flops! Those (Old Navy) are the same level of comfort (hard plastic), but costs much less.  Only reason I gave it 2 stars vs 1 star because they do fit as expected in size.