Assertion: sea otter's fur | /r/MadeOf | two layers
Facets:
Source sentences:
text: Their fur actually consists of two layers, an undercoat and longer guard hairs.
text: The sea otter's fur also consists of two layers, a waterproof layer of long guard hairs with a layer of short thick fur underneath.
text: The fur consists of two layers: a dark undercoat and longer, lighter-colored guard hairs, which trap a layer of air next to the skin to keep it dry.
text: The fur consists of two layers.