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Alpaca socks are unique in that alpaca is a hollow core fiber. This means the yarns that make up the socks wrap your foot like a radiator carrying warm air to keep your feet warm when it's cold out...
Answer
Alpaca socks are unique in that alpaca is a hollow core fiber. This means the yarns that make up the socks wrap your foot like a radiator carrying warm air to keep your feet warm when it's cold out...