Yes, it is a rather strange bastardization of the word, but it has been used for e.g. fabrics for expensive ski jackets for a while now.  <a href="http://www.merriam-webster.com/dictionary/breathable" rel="nofollow">http://www.merriam-webster.com/dictionary/breathable</a><p><a href="http://en.wikipedia.org/wiki/Waterproof_fabric" rel="nofollow">http://en.wikipedia.org/wiki/Waterproof_fabric</a>
"Breathability is measured by the rate at which water vapor passes through, in the units of grams of water vapour per square meter of fabric per 24 hour period (g/m2/d), often abbreviated to just 'g'. "