Thank you so much for sharing your feedback. We’re glad to hear the design printed well on your Mailer Box Samples, and we truly appreciate your candid thoughts about the material feel. We understand how important it is for packaging to not only look great but also feel sturdy and reassuring in hand. The mailer boxes you received are made from 1/16" white E-flute corrugated cardboard, chosen for its lightweight structure, crush resistance, and excellent printability. While E-flute is ideal for small to mid-sized shipments, it can feel thinner compared to more rigid packaging options—especially if you're seeking a more premium tactile experience. For customers looking for a thicker, more substantial material, we recommend exploring our Full-Print Shipping Boxes or Square Mailer Boxes, which use 1/8" white B-flute cardboard. B-flute offers a noticeably sturdier feel and is better suited for heavier or bulkier items. You can learn more about these options on our packaging page (https://www.vistaprint.com/packaging/shipping-supplies). Your feedback has been shared with our product team as part of our ongoing efforts to improve both the functionality and customer experience of our packaging solutions. If you have any questions or would like personalized assistance in selecting the best packaging for your needs, our Customer Support team is here to help at 1-866-207-4955, or you can visit our Help Center (https://www.vistaprint.com/customer-care/help-center/). Thank you again for helping us grow—we’re grateful for your input and look forward to serving you again.