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What is "Air Permeability" - Definition & Explanation

The volume of air passing through a fabric under pressure.
The porosity of a fabric as estimated by the ease with which air passes through it. Air permeability measures the warmth of blankets, the air resistance of parachute cloth, the wind resistance of sailcloth, etc. as measured on standard testing equipment.
The permeablity, or the ease with which air passes through material. Air porous ness determines such factors as the wind resistance of sailcloth, the air resistance of parachute cloth, and the effectiveness of different kinds of air filtration media. It is also a measure of warmness, or coolness of a fabric.
The degree to which a fabric, coating or laminate allows air to pass through its construction.

Some other terms

Some more terms:

One of the softest fabrics made. Named from the American-Indian term “shale” meaning soft. Usually plain weave fabrics printed with delicate floral patterns, in Persian or cravat effects. ...
Closed shed refers to the shed being closed at beat-up. In other words, all the harness are at the same position during beat-up and there for the shed is closed. -- George C. Pedersen, CEO &...
A nubby, soft fabric made from recycled soda bottles. Every time you purchase something from eco-fleece you are contributing to saving another piece of the earth, which would otherwise be used as...
Bell bottoms are trousers that become more wide from the knees downwards. It is believed that bell-bottom pants were introduced in 1817 to sailors working on deck. The flare at the end of the pant...
Graphite-reinforced plastic or carbon fibre reinforced plastic (CFRP or CRP), is a strong, light and very expensive composite material or fibre reinforced plastic. Like glass-reinforced plastic, the...

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