I bought these for Maui and didn't wear them before getting here, but I've been really pleased.  I have large, wide feet and often find sandals not explicitly sized wide width can be uncomfortable, unless I order men's.  I wear a size 10.5 women's wide in running shoes and wear orthotics, and I ordered these in a 10.5 regular width.  They fit fine, without my feet hanging over the sides and they have enough arch support that I haven't missed my orthotics.  The straps incorporate a stretchy material in the composition and are tightened with velcro.  No blisters to report after a couple of days of sightseeing, including a crater.  They seem indestructible.