Polar Bears By Melissa Polar Bears Fur Polar bears fur is actually clear, not white. The sun reflects off their coat, making it look white. Their skin is black, which absorbs the heat and keeps the polar bear warm. Since they have two layers of fur, adults often overheat when they run.
Polar bears are most active during the first third of the day, and least active the last third. When polar bears are not hunting, they are usually sleeping.