Hi Robin,
Thank you for your feedback.
We're so sorry to hear from you that the canvas you received is very thin. We checked again with our factory about this matter and they confirm that they have never changed the material of canvas. It is made from proper-coated, archival-quality, poly-cotton canvas.
We notified our factory to focus on this matter already.
Once again, we sincerely apologize for any inconvenience caused.
Best wishes !