Cedar Creek Grist Mill printed on both sides of bag. Thicker material than most other Poly bags. High Quality Self Sealing Mailers. Thicker and Stronger. You can feel the difference. UPS, FedEx & USPS APPROVED Superior tear and puncture resistance The dark inner layer provides confidentiality. Pressure sensitive adhesive provides a high strength durable closure, water and dirt resistant. Mailers are perfect for shipping a wide variety of non-fragile items. Water, Tear and Puncture resistant. Lightweight saves on postage. High strength seams allow for over-stuffing. Fast Shipping!