A better Poly offering

The quality of the poly mailer was great when I received it. I will say that my logo appeared sharp on the proof (digital of course) but a key part of the logo was barely visible on white on the final product. I consider for a split second whether to darken the contrast a bit for the next batch but its silly to alter my brand based on one print run. I've gotten biz cards and other marketing materials elsewhere and didn't have the same issue so i'm not sure if its the gloss/varnish on the mailer bags that didn't quite allow the ink saturation to match the proof. All in all I will use them for mailing tshirts to clients who already know me versus for new client retention mailings. I wouldn't want to confuse a potential client.