These are a neat looking sandal, but I ordered my usual size and found them to be extremely too large; I cannot comment whether they would be comfortable when worn, although I think they would make a comfy sandal.  There is no support in the sole - but that is usual for most of your typical flip-flops; at least with these, if one had the right size, they could fit snugly and hug your foot - what I hoped and anticipated.  I returned them and opted not to try to next smaller size, risking the need again for a return.