Slip-on style shoes with an open back and a closed front that are generally casual and comfortable. The sole is very rigid and traditionally made from wood, but modern styles also feature cork, rubber, or plastic soles.
About Heel:
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 Skull:
In the past few years we have seen skull patterns adorn all types of clothing - from t-shirts to sneakers, and belts to watches. But skull patterns have been culturally significant since the eighteenth century!
Pirate ships flew a Jolly Roger flag with skulls and crossbones, to frighten their victims into an early surrender. With their prominence in so many designers' current lines, you don't have to fear these fashionable skulls anymore.