To protect the animal from their environment. And wool IS that "thick coat of hair" you mentioned.
a sheep
polar bears
to keep themselves warm
Many animals have hair that helps to keep them warm. Polar Bears, all other species of bears. Yaks, Highland cattle, are just 4 examples of animals that have thick, long hair.
They have a thick coat so they can live in the freezing temperatures of Russia.
A person can wear a coat in cold weather to keep warm. It is the same principle for animals that have feathers or fur.
Different animals have different ways of surviving the Antarctic weather. For some it might be their thick coat of fur or simply huddling together in a group.
A blobber is another term for a blubber, a fatty layer of adipose tissue or thick coat of fat worn by many arctic animals.
Rubber cement can dry in 15 minutes if it is not a very thick coat. If it is a thick coat, it will take longer.
a thick fur coat.
they have a thick coat of fur
45-60 pounds, about 21-23.5 inches tall, and Thick double coat - thick undercoat and soft outer coat.