An important measurement of protection for some outer garments is the ability to prevent air or wind to move through a fabric. The term ‘windbreaker’ is often used to describe this attribute for jackets or coats for everyday use. In extreme outdoor cold and windy conditions, wind protection and breathability (which allows perspiration to evaporate, and so, help avoid hypothermia) are real safety concerns for people who must work or choose to be outdoors in such weather. Textiles can provide resistance to air penetration by means of fabric construction, fiber content, chemistries or a combination of these elements.
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