Polar Bears have a very thick layer of skin. Singapore, being a tropical country, has a very unsuitable climate to house polars. That's why the zoo has a very large pool for the polars to swim in if it gets hot. But I wonder how cold icy the pool is... I mean, the polars are not in an enclosed area. That means they can actually feel the heat that we are experiencing. And I remembered sweating when I am only a few meters away from the polars.