CFM | Definition
Pronunciation:
Acronym for Cubic Feet per MinuteÂ
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Definition:Â
CFM is a measure of wind permeability ain fabric. 0 CFM is complete wind proofness.Â
Here’s an outline for the practical application of these numbers:
- 60 CMF – about what an average fleece material is rated; the wind will go right through this.
- 20 CFM – wind-resistant.
- 10 to 5 CFM – very wind-resistant; what most softshells are rated.
- 1 CFM or less – considered windproof.
- 0 CFM – completely windproof; no wind at all will get through and therefore you will experience no convective heat loss.
Resource:Â
https://blog.jans.com/an-explanation-of-technical-clothing-ratings/
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Glossary Category:
Testing