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Expansion Poly Mailers 2.5 Mil

Our Expandable Poly Mailers are tamper-proof, water resistant and have a third dimension gusset (ranging from 2″ – 5″) to allow room for wider product. These 2.5 mil thick, co-extruded, opaque courier bags have a white exterior and silver interior.

Quantity Discount Chart
1-4 5-9 10-19 20+
$94.14 $91.32 $89.43 $87.55
Quantity Discount Chart
1-4 5-9 10-19 20+
$74.87 $72.62 $71.13 $69.63
Quantity Discount Chart
1-4 5-9 10-19 20+
$63.69 $61.78 $60.51 $59.23
Quantity Discount Chart
1-4 5-9 10-19 20+
$67.02 $65.01 $63.67 $62.33
Quantity Discount Chart
1-4 5-9 10-19 20+
$52.27 $50.70 $49.66 $48.61
Quantity Discount Chart
1-4 5-9 10-19 20+
$56.10 $54.42 $53.30 $52.17
Quantity (units)

  Select a size above to see the Unit Quantity.

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Please contact us at 888.998.8766 if there is a product, product size, color that you don't see listed above or Request for Custom Quote. Pricing shown is for unprinted product, however custom printing and colors are available on some products.

Our poly products are made from a mixture of high density (HDPE), low density polyethylene (LDPE) or polypropylene (PP) resins and can be recycled under PIA Recycle Code 2, 4, 5 respectively. Check with local recycling facilities to determine the suitability of recycling this film in your area.

Product Details

Our Expandable Poly Mailers are great for shipping thick, bulky items that do not fit in standard size mailers.

Technical Specifications for 2.5 Mil Expansion Poly Mailers expands to 5″

Product Overview: Our 2.5 Mil Expansion Poly Mailers are designed to provide reliable and flexible packaging solutions for shipping various items. Crafted from high-quality polyethylene material with a thickness of 2.5 mils, these mailers offer durability and resistance to punctures and tears. The expandable gusset allows for increased capacity, accommodating bulkier or irregularly shaped items with ease. The self-sealing closure ensures secure packaging, while the lightweight construction helps minimize shipping costs.

Key Features:

  • Material: High-quality polyethylene for durability and flexibility.
  • Thickness: 2.5 mils, providing sufficient protection for shipping.
  • Expansion Gusset: Allows for increased capacity to accommodate bulky or irregularly shaped items.
  • Closure: Self-sealing adhesive strip for secure and hassle-free packaging.
  • Lightweight: Helps minimize shipping costs while providing adequate protection.
  • Size Variety: Available in multiple sizes to suit various shipping needs.
  • Versatility: Suitable for shipping clothing, books, electronics, and other lightweight items.
  • Recyclability: Made from recyclable materials, promoting environmental sustainability.


  • Material Composition: Polyethylene
  • Thickness: 2.5 mils (0.0025 inches)
  • Closure Type: Self-sealing adhesive strip
  • Expansion Gusset: Yes
  • Color: Light grey or white
  • Recyclability: Yes


  • E-commerce Shipping: Ideal for packaging and shipping clothing, accessories, books, and small electronics.
  • Retail Shipping: Suitable for mailing promotional materials, catalogs, and lightweight products.
  • Bulkier Items: Perfect for shipping items with irregular shapes or bulkier dimensions due to the expandable gusset.
  • Personal Use: Great for mailing gifts, documents, and other lightweight items.

Environmental Considerations: Our 2.5 Mil Expansion Poly Mailers are made from recyclable materials, supporting eco-friendly practices and responsible waste management.

Customization Options: Custom printing options are available to add branding or promotional messages to the mailers. Contact us for further details on customization options and bulk ordering.

  • Strong polyethylene mailers protect products from moisture during shipping.
  • 2.5 Mil Polyethylene
  • Features a gusseted bottom to allow for thicker items such as binders, books, and catalogs.
  • Puncture, moisture, tamper and tear resistant.
  • High strength seams will keep contents intact even if over packed.
  • Color Grey/White – conceals content inside
  • Labels, ink, and stamps adhere well.
  • Self-seal closure with a double perforation tear strip for easy opening.
  • Quality tested!

Our US made poly products are manufactured with 100% renewable energy. These are Smart Tech Bags, engineered to provide over three times the impact and twice the tensile strength of traditional low-density polyethylene bags.

For items not listed, we can provide prices and lead time in very short order. We produce case-packed layflat poly bags up to 54" wide in gauges of 0.75-8mil. Custom items ship in just 6 days from time of order on average.