A heel is the bottom, back part of a shoe or boot that provides elevation. The styling and construction of a heel may vary (i.e., stacked, stilletto, spiked, sculptured, kitten).
About Oil Resistant:
Oil Resistant soles, mostly employed in safety footwear for professional use, are made of a special synthetic material intended to prevent slipping and to withstand long periods of time on oily surfaces without deteriorating.