Made for all day on the job comfort roomy by design like our original clogs the mercy work offers generous room all around the foot it has crocs locktrade tread for slip resistance heel hugging backstrap and a closed heel mercy work details roomy fit like our original clogs for maximum comfort designed for work environmentsmdashlaboratories school medical facilities and more crocs locktrade slip resistant tread tiny nubs along the foot bed provide a massage like feel enhanced