The color of a polar bear’s fur is actually transparent, appearing white due to the way it reflects light. Polar bears have a thick layer of insulating fat beneath their skin, and their fur is hollow, which helps trap air and provides insulation against the cold Arctic temperatures. In bright sunlight, polar bear fur can appear yellowish, but under other conditions, it reflects the white surroundings of their icy habitat. This coloration helps them blend into their environment while hunting for seals, their primary prey, ensuring they can remain stealthy and effective predators in their natural habitat.