I have been buying Chacos for over 10 years. I love them, but one thing I've noticed is that the widths have decreased, specifically at the real (heel) portion of the footbed.  This has kept me from purchasing Z/1s & Z/2s.  I have to return both due to narrow heel.  This sandal is no different, but without the strap my foot can still fit comfortably.  Other than that, solid sandal at a great price.