All Arcteryx Squamish windshell users, is the fabric used in this jacket air permeable?
Arcteryx says the fabric, called Gossamera, has a very light urethane coating on the inside surface of the fabric.
The recent BPL review of the Squamish stated that breathability was on par with similar windshells, such as the Houdini.
The Houdini has an air permeability rating of 5 CFM. But the Squamish, unless it has a microporous urethane coating, may not be air permeable.
Anyone care to do a blow-through or suck-through test on their Squamish?
Arcteryx says they'll get back to me with a CFM rating from the fabric source. Will post that when I get it.

