A polar bear's fur is actually transparent and appears white due to the way light reflects off its hair. Each hair is hollow, which helps trap air and provides insulation, keeping the bear warm in its frigid Arctic habitat. The white appearance helps polar bears blend in with their icy surroundings, serving as effective camouflage while hunting for seals and other prey. Despite the warm insulation provided by their fur, polar bears are at risk due to climate change, which leads to melting ice and loss of habitat. This unique adaptation highlights their specialization in surviving harsh environments.