The products are used for Courier, Parcel and Freight companies for the secure movement of their client’s documents and consignments.Light surface and good quality,anti-moisture,anti-waterproof, anti-pollution the bag can be printed all kinds of exquisite pictures. Your custom logo will look great as the centerpiece of this bag! Imprint and size can be custom. Made from poly material, measuring 4 x 4 inches, this custom poly shipping bag mailer. Usage Scenarios: Office supplies, school stationery, corporate promotions, trade show giveaways. We offer logo printing and full packaging customization. Product Highlights: Eco-friendly material, reusable, foldable for storage.