Polar bears have hollow hairs which trap the little heat there is and bring it closer to the skin and make the polar bear warmer.
Low temperature
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Hollow
Freezing cold climate for example the snowy hair has long and fluffy hair to stay warm in the cold brutal winters
Reindeer have hollow hair, but deer which live in temperate zones do not.
i think with low temperature
Polar bears have hollow hair. Each hair is a clear hollow tube which reflects the light, making polar bears' fur appear white, though each hair is actually transparent. Alpacas have hollow hair. They are indigenous to the Andes mountains and live in sub-zero climate. To accomodate this they have hollow hair to insulate and keep them warm. Similarly, llama have hair with a hollow core fibre. Hollow hair, in fact, is an adaptation of animals which live in very cold climates. Reindeer, or caribour, also have soft hollow hairs, densely packed together.
sea otters do have hollow fur to help them float... so yes sea otters have hollow hair.
No they do not.
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no