My husband has owned three pairs of Sanuk's.  He loved this dressy new style.  He finds the inside heel material stiff and somewhat ruff.  It's digging into his heels and they're uncomfortable to wear.  He has never had this problem with a prior pair.  I think the leather on the back of the shoe is making the heel much less flexible.  Does someone have a suggestion to make these comfortable?  He loves the style, but not the discomfort.