The black crocs seem stiffer than the colored ones.  Also, those holes have a purpose.  Don't think I'll get as much use out of these.  They are not suitable for work, at least my line of work. They were inexpensive, so I won't be grousing about the cost.

It turns out that they work well foe winter.  They shed snow and without the holes my feet stay dry and warm enough for quick forays outside.