Wearing many layers of cottton clothes will keep you as warm in winter as wearing a thick woolen sweater. Why?

it is because wool is very thick from which air do not pass through and we do not feel cold

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oh yes! u r right manvi 

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Layering clothing ensures that there is an insulating space between each of the layers, and your body heat is retained within the layers. A single sweater may be warmer than any one individual layer, but cannot retain your body's heat in the same manner.


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 Layering clothing ensures that there is an insulating space between each of the layers, and your body heat is retained within the layers. A single sweater may be warmer than any one individual layer, but cannot retain your body 's heat in the same manner. 

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Actually you are wrong. Cotton never ever even if we are wearing 4 or 5 layers of cotton clothes, it wil not keep us warm.

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Layering clothing ensures that there is an insulating space between each of the layers, and your body heat is retained within the layers. A single sweater may be warmer than any one individual layer, but cannot retain your body 's heat in the same manner.it is because wool is very thick from which air do not pass through and we do not feel cold

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soil
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This is because wool has a very thick layer and it has no space for air to pass through it
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As wearing as many layers of cotton clothes keeps us warm we can say that due to wearing excessive clothes it does not let air pass through it and as a result it keeps us warm
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Cotton clothes can let in air.If you wear many layers of cloth then the effect will be of having fluffy clothing material that can retain air.Since air is a insulator of heat , wearing many layers of cotton will keep you warm.This is the same way in which woollen clothing also works
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