The base of the strap support that is near the arch is unusually wide, encroaching under the arch of the foot. This makes the shoe uncomfortable if the wearer has slightly wide arches or is flat footed.  This does not seem to be a problem on any of the other Crocs brand shoes.  I own a bunch of Crocs and none of the arches on them are bothersome. Getting a size larger would probably be wise if you know your foot is on the wide side. According to my local shoe store, my foot is not considered wide, but the base of the strap on these Crocs makes my feet hurt like heck after only wearing them for 10min. The part of my foot that rides up on the strap gets quite red and swollen. The strap is slightly over 1/2inch wide at the base of the shoe with a gradual slope to a relatively narrow strap. This is about a 1/2 in too wide in my opinion, ruining an otherwise great shoe.