The fabrics we use are down proof, but sometimes the insulation will appear to be leaking through the fabric. This is because the down that we use is (normally) a mix of 90% down and 10% feathers. The feathers possess sharp quills and these are the bits that can work their way through the fabric or stitch lines.
Down is exceptionally fine and can work itself through small openings. A small amount of down escaping through the fabric or through any seam line is expected and common in any down garment, particularly early on (the first month or so).
What if I see some down poking through?
If you do see some down or a feather poking through the fabric do not pull it out.
Pulling the cluster through the jacket may cause an even bigger hole to develop.
Try to pull the down or feather back inside the jacket. Do this from the underside of the fabric. And then gently rub the area between your fingers. Rubbing the area where the down or feather was poking through will move the fabric strands back together, helping to seal up any opening.