Hi all,

I'm interested in sewing a few vapour barrier items and I'm searching for fabric. I've read that Warmlite uses something called 'fuzzy stuff' which is a polyester polyurethane laminate (PUL). I've found a few different sources for similar fabrics but they are all listed as being 'breathable' which isn't quite what I'd like. For example:

https://www.wazoodle.com/fabrics/pul-fabric/1mil-pul/pul-fabric.html

https://www.saharafabrics.com/what-is-pul-fabric/

How 'breathable' should a vapour barrier fabric be?