Product Overview
Made of the highest quality materials, the grey shipping bags are extremely durable and resistant to punctures, tears and moisture. Equipped with a strong adhesive, this tamper-proof pouch helps protect your business from theft and lost packages. It is available in a variety of sizes to accommodate a variety of items and uses. The 55-micron thick grey material provides enough strength while remaining lightweight to save on postage.
The grey shipping bags come with a self-sealing strip for easy peeling and sealing. Simply peel to reveal the adhesive and you can self-seal the shipping and mailing bags in seconds. This mailing envelope eliminates the need for packing tape and shipping boxes, saving you packing time.
Features of mailing bags
Eco-Friendly LDPE Material
Made from recyclable LDPE, supporting sustainable packaging practices and reducing environmental impact.
Gray Opaque Design
Provides privacy and protection for shipped items, keeping contents secure and hidden.
Strong Self-Adhesive Seal
High-adhesion strip ensures one-time sealing, tamper-evident and secure.
Waterproof & Moisture-Resistant
Protects items from water, moisture, and adverse conditions during transit.
Lightweight but Tear-Resistant
Reduces shipping costs while maintaining excellent tensile and tear strength.
Product Advantages
✅ Cost-Effective Shipping – Lightweight material reduces shipping fees.
✅ Professional Appearance – Clean, uniform gray design enhances brand image.
✅ High Security – Tamper-evident design prevents unauthorized access.
✅ Eco-Friendly Branding – Recyclable materials align with green initiatives.
✅ Automation Ready – Flat envelope design fits automated packing systems.
Common Sizes & Thickness
| Size (W × L + Flap) | Thickness (Microns) | Recommended Use |
|---|---|---|
| 190 × 260 + 40 mm | 50–60 μm | Documents, small accessories |
| 240 × 320 + 40 mm | 60–70 μm | T-shirts, lightweight clothing |
| 280 × 380 + 50 mm | 60–80 μm | Outerwear, books |
| 320 × 450 + 50 mm | 70–90 μm | Multiple clothing items |
| Custom Size | Custom Thickness | OEM / Private Label |
Sizes and thicknesses are fully customizable.
Custom gray mailing bags
We offer full OEM / ODM customization:
Size – Tailored to your product and shipping needs
Color – Gray standard, other eco-friendly colors available
Printing – Logo, brand message, QR code, or warning text
Thickness – Adjustable to match weight and protection requirements
Material Options – 100% virgin LDPE or LDPE/recycled blends
Packaging Options
Standard carton packaging (500 / 1000 pcs per carton)
Custom quantities per carton
Pallet packaging for bulk orders
PE inner bag + outer carton for extra protection
Mailing Bags Packaging Trends
Eco-friendly and recyclable materials dominate
Brand customization for unique customer experience
Lightweight yet strong structures
Tamper-evident and secure designs
Automation-friendly for modern logistics systems
FAQ
Q1: Are these gray mailing bags recyclable?
A: Yes, made from recyclable LDPE material, supporting sustainable packaging practices.
Q2: Can we print our logo on the bags?
A: Yes, multi-color printing is available for branding purposes.
Q3: Is the adhesive seal tamper-evident?
A: Yes, the high-adhesion strip prevents reopening without leaving evidence.
Q4: Are these bags suitable for international shipping?
A: Absolutely, they are lightweight, waterproof, tear-resistant, and ideal for long-distance shipping.
Why Choose Us
As a professional plastic packaging bag manufacturer, we have extensive experience, stable quality control systems, and flexible customization capabilities, providing high-quality mailing bag solutions to global clients.
Contact us today for sample requests and customized gray eco-friendly envelope shipping bags!
Production Procedure
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