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2015-02-05T20:55:02+05:30

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1) woollen yarn contains a large amount of air trapped ,so it does not allow our body heat to flow out.

2)woollen yarn is a bad conductor of of heat,so it does not allow the body heat to flow forward.

3) woollen yarn has high specific heat so,it does not allow the body heat to flow out quickly

4) because of the above reasons ,woollen does not decrease our body temperature.

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