Quote:
Thanks, Pika. When I read about these waterproof down bags (outside waterproofness) They claim to be "breathable" waterproof fabric.
Can I treat my bag to be breathable?


Yes.

1) Remove existing outside fabric layer

2) sew on a new waterproof and breathable outer fabric layer.

The sewing part might get a little tricky, as you have to sew to the interior baffles and not let all of the down blow away while you are working on it.