The large paws of a polar bear act like snowshoes, spreading out the bear's weight as it moves over ice and snow. The forepaws are round, and the hind paws are elongated. Each toe has a thick, curved, nonretractable claw. The claws are used for grasping prey and for traction when running or climbing on ice. The papillae create friction between the foot and ice to prevent slippage.
Long hairs growing between pads and toes also help prevent slippage.
A polar bear's head is oblong and relatively small compared to body size. The nose is broad and black. Polar bears have 42 teeth, which they use for catching food and for aggressive behavior. Polar bears use their incisors to shear off pieces of blubber and flesh. Canine teeth grasp prey and tear tough hides.