100 4×6 Poly Mailers Self Seal Envelopes 4″ x 6″ Description Poly Mailers with an off white on the outside gray on the inside, water-resistant , tear-proof, plastic envelope with a extra smooth surface that is perfect for handwriting or labeling. Mailers provide a clean and professional appearance. Features & details Poly Mailers with an off white on the outside gray on the inside. Extremely durable and lightweight material helps save on postage. High-Quality Self Sealing Mailers for shipping a wide variety of non-fragile items. Self-sealing, peel and stick, adhesive keeps contents secure and tamper-proof. Strong seams, fins on two sides, and seamless bottom for maximum protection. The surface easily accepts ink, stamps, and labels Approved by shipping carriers. Best Mailers for Wet Weather Conditions. Includes 100 Poly Bags