The yak is a long-haired cattle from Central-Asia and can mostly be found in the Himalayan region.
They are heavily built and have a thick and long coat with an extra thick woolly undercoat over the chest, flanks and thighs to insulate them against the cold. Bulls often have a long "skirt" that can reach the ground. Wild yaks are mostly dark blacky brown while domesticated yaks can have a variety of colours.
Yak hides have a very rough and wild appearance.