Some adaptations of polar bears are their white fur, which camouflages them against the white ice floes where they hunt, and wide forepaws, which act as paddles when they swim. Their feet have fur to allow them to gain purchase on the ice and snow.
Polar bears also have sensitive lips and whiskers that allow them to investigate their world. They have a good sense of smell that allows them to find prey. Polar bears have also developed clever hunting techniques that allow them to capture seals, their favorite prey. In one technique called still hunting, the bear finds a seal's air hole in the ice and simply waits for the seal to come up for a breath. The bear may also swim underneath the ice where the seal has hauled out, emerge through its air hole and capture it.
Polar bears' claws are short compared to the claws of other bears. This also allows them to walk on ice and get a better grip on their prey.
Polar bears also have an extraordinary ability to live off of their fat when food is scarce. Bears of Hudson Bay fast from July to November and neither drink nor urinate. Pregnant females fast even longer than this.