Collection: Poly Mailers | Durable Self-Sealing Shipping Bags

Poly Mailers for Lightweight E-Commerce and Retail Shipping

Poly mailers provide a lightweight, flexible and economical packaging solution for shipping apparel, accessories, textiles, uniforms, bedding and other non-fragile products. Their durable polyethylene construction helps protect merchandise from light moisture, dirt, dust and ordinary handling conditions while keeping package weight low.

Gpack Supplies offers white self-sealing poly mailers in sizes from 6" x 9" through 24" x 36". This range allows businesses to select compact shipping bags for small accessories or larger mailers for jackets, blankets, uniforms and multi-item apparel orders.

Each plastic shipping envelope includes a pressure-sensitive adhesive flap for fast closure without additional packing tape. Fulfillment teams can insert the product, remove the release liner, seal the flap and apply the shipping label in a few simple steps.

Poly shipping bags are especially useful for e-commerce retailers, clothing businesses, fulfillment centers, promotional-product companies and warehouse shipping departments. They require less storage space than many assembled boxes and can help reduce material use when rigid protection is unnecessary.

What Are Poly Mailers?

Poly mailers are flexible shipping envelopes manufactured from polyethylene film. They are designed to contain and protect lightweight products during storage, order fulfillment and transportation.

Unlike corrugated boxes, poly bags do not have rigid walls. The flexible material conforms closely around soft or non-fragile merchandise, helping reduce excess package volume and unnecessary dimensional weight.

A self-sealing adhesive strip is built into the closure flap. After the product is placed inside, the release liner is removed and the flap is pressed firmly against the bag to create a secure seal.

White poly mailers provide a clean exterior for shipping labels, barcodes, warehouse identification and return information. Their opaque construction also helps conceal the contents during normal shipping conditions.

Poly Mailer Sizes Available from Gpack Supplies

Choosing the correct poly mailer size helps reduce excess material, improve package appearance and prevent unnecessary movement. Product thickness should be considered in addition to width and length.

How to Choose the Correct Poly Mailer Size

Measure the Product Width and Length

Measure the complete product after it has been folded or prepared for shipment. Include any retail packaging, protective bag, invoice or promotional insert that will travel inside the mailer.

Account for Product Thickness

Poly mailer dimensions are normally stated as width by length, but thick products reduce the usable interior space. Add extra clearance for sweatshirts, bundled apparel, bedding and multiple-item orders.

Select the Smallest Practical Size

Choose the smallest mailer that allows the product to enter without excessive force and permits the flap to close securely. This creates a cleaner package and reduces excess plastic.

Avoid Overfilling

Overfilled mailers place stress on the side seams and adhesive flap. If the product creates excessive tension or prevents the flap from lying flat, use the next larger size.

Reduce Excess Empty Space

A poly mailer that is too large may appear unprofessional and can allow the contents to shift. Fold soft products neatly and select a size that conforms reasonably close to the merchandise.

Test the Complete Pack-Out

Before purchasing large quantities, prepare a sample shipment using the product, invoice, return label and any other inserts. Confirm that the bag closes fully and the carrier label remains flat.

Benefits of Self-Sealing Poly Mailers

Lightweight Shipping

Poly mailers add minimal packaging weight compared with many corrugated boxes. Lower weight can help control parcel shipping expenses for suitable merchandise.

Self-Sealing Closure

The built-in adhesive flap allows packers to seal orders quickly without applying separate packing tape. This supports efficient fulfillment workflows.

Moisture-Resistant Exterior

Polyethylene film helps protect contents from light rain, damp surfaces, dirt and dust during ordinary delivery conditions. Poly mailers should not be treated as completely waterproof.

Tear-Resistant Construction

Durable poly film resists ordinary tearing and puncturing better than many paper envelopes. Sharp or heavy products may still damage the material and require rigid packaging.

Flexible Design

The bag conforms around clothing, fabrics and soft products, reducing unused package volume and creating a compact shipment.

Compact Warehouse Storage

Unused poly mailers occupy less warehouse space than assembled corrugated boxes. Cases can be organized near packing stations according to size.

Clean Shipping Presentation

White poly mailers offer a simple, professional appearance and a smooth surface for shipping labels, barcodes and order identification.

Opaque Packaging

The white plastic construction helps conceal the contents from normal viewing, providing additional privacy for clothing and retail shipments.

Fast Fulfillment

Packing teams can insert merchandise, remove the adhesive liner, seal the flap and label the shipment with minimal handling steps.

Common Uses for Poly Shipping Bags

Apparel and Clothing

Poly mailers are widely used for T-shirts, pants, dresses, uniforms, sweaters and jackets. Soft garments usually do not require the rigid protection of a corrugated box.

Fashion Accessories

Scarves, hats, socks, gloves, belts and fabric accessories can be shipped in small or medium poly mailers. Hard buckles or sharp decorative components should receive additional protection.

E-Commerce Fulfillment

Online retailers use poly bags because they are lightweight, compact and fast to seal. Standardized sizes help fulfillment centers create consistent packing procedures.

Textiles and Linens

Larger mailers can hold towels, sheets, pillowcases, blankets and other textiles. The merchandise should be folded and protected from sharp objects before insertion.

Uniforms and Workwear

Uniform companies can use medium and large shipping bags for shirts, pants, jackets and complete employee clothing sets.

Promotional Products

T-shirts, fabric bags, caps and other promotional merchandise can be packed efficiently in appropriately sized poly envelopes.

Returns and Exchanges

Poly mailers can be used for replacement shipments and returns when the product remains soft, lightweight and properly contained.

Books and Printed Products

Some lightweight books, catalogs and printed materials can be shipped in poly mailers when bending and impact protection are not major concerns. Rigid mailers or boxes are better for sensitive printed products.

Warehouse Transfers

Businesses may use poly mailers to contain apparel, textiles and parts during transfers between stores, warehouses and fulfillment centers.

Subscription Orders

Clothing subscriptions and promotional programs can use larger poly mailers for compact multi-item orders.

Poly Mailers Compared with Other Shipping Packaging

Poly Mailers vs. Poly Bubble Mailers

Plain poly mailers and poly bubble mailers both use a polyethylene exterior, but they provide different levels of protection.

Plain poly mailers are best for soft and non-fragile products such as clothing, textiles and fabric accessories. Their thin construction minimizes packaging weight and storage space.

Poly bubble mailers include an interior bubble lining that provides additional cushioning. They are better suited for books, accessories, cosmetics and products that may be scratched or damaged by ordinary impacts.

Use a plain poly mailer when the product does not need cushioning. Choose a bubble mailer or corrugated box when the merchandise requires additional protection.

When to Use a Poly Mailer Instead of a Box

A poly mailer is appropriate when the product is lightweight, flexible, non-fragile and not easily damaged by pressure. Apparel and textiles are the most common examples.

Poly bags are useful when the merchandise does not need rigid sidewall protection, cushioning or void fill. Their flexible design helps reduce package dimensions and shipping weight.

Use a corrugated box for products that are fragile, heavy, sharp, crush-sensitive or structurally rigid. Boxes are also better when several hard products could strike each other during transportation.

Packaging selection should be based on product protection and carrier handling conditions, not shipping cost alone.

How to Pack Products in Poly Mailers

1. Inspect the product for sharp edges, hard corners or loose components.
2. Fold clothing and textiles neatly to reduce unnecessary volume.
3. Place the product inside a protective inner bag when additional cleanliness is required.
4. Select a poly mailer with enough room for the complete product.
5. Insert the merchandise without forcing or stretching the side seams.
6. Add the invoice, return label or promotional insert.
7. Remove the release liner from the self-sealing flap.
8. Fold the flap evenly across the opening.
9. Press firmly along the full adhesive strip.
10. Apply the shipping label to a flat, clean and dry surface.
11. Keep barcodes away from folds, seams and wrinkles.
12. Inspect the completed shipment before carrier pickup.

Best Practices for Poly Mailers

• Measure product width, length and thickness before selecting a size.
• Choose the smallest bag that closes without excessive tension.
• Do not overfill the mailer or strain the side seams.
• Protect sharp buckles, corners and accessories before packing.
• Use a bubble mailer or box when cushioning is required.
• Seal the adhesive flap across its entire width.
• Apply labels to clean, flat and dry plastic.
• Keep carrier barcodes away from wrinkles and seams.
• Test representative shipments before ordering large quantities.
• Store cases according to mailer size for faster fulfillment.
• Keep unused mailers away from excessive heat and direct sunlight.
• Protect mailer cases from heavy pressure and sharp warehouse equipment.

How to Store Poly Shipping Mailers

Store poly mailers in a clean, dry and covered warehouse area. Keep them inside their original cases until needed to protect the adhesive strips and exterior surfaces.

Avoid prolonged exposure to excessive heat, direct sunlight and open flames. Extreme temperatures may affect the plastic material or adhesive performance.

Do not place extremely heavy products on top of mailer cartons. Excessive pressure can bend the bags, crease the adhesive flap or damage the case.

Organize inventory by dimensions and case quantity. Clearly labeled storage areas help fulfillment employees choose the correct size and reduce packing errors.

Industries That Use Poly Mailers

• E-commerce clothing retailers
• Apparel manufacturers and distributors
• Fashion and accessory businesses
• Fulfillment centers
• Uniform suppliers
• Textile and linen businesses
• Promotional-product companies
• Subscription clothing services
• Retail shipping departments
• Third-party logistics providers
• Sportswear companies
• Screen-printing businesses
• Embroidery shops
• Wholesale apparel distributors
• Online marketplaces and resellers

Frequently Asked Questions About Poly Mailers

What are poly mailers used for?

Poly mailers are used to ship clothing, accessories, textiles, uniforms, bedding and other lightweight, non-fragile products.

What poly mailer sizes does Gpack Supplies offer?

Gpack Supplies offers sizes from 6" x 9" through 24" x 36".

What is the smallest poly mailer available?

The smallest option in this collection measures 6" x 9" and is sold in cases of 1,000.

What is the largest poly mailer available?

The largest option measures 24" x 36" and is suitable for bedding, blankets, apparel bundles and oversized textiles.

Are poly mailers waterproof?

Polyethylene helps resist light moisture, but the mailers should not be considered completely waterproof or suitable for prolonged water exposure.

Do poly mailers have a self-sealing closure?

Yes. Each mailer includes a pressure-sensitive adhesive flap for fast closure.

Do poly mailers require packing tape?

Additional tape is generally unnecessary when the mailer is properly filled and the self-sealing flap is applied correctly.

Can poly mailers be used for clothing?

Yes. Apparel is one of the most common products shipped in poly mailers.

Can poly mailers be used for books?

They can be used for some lightweight books, but poly mailers do not prevent bending or provide cushioning.

Can poly mailers ship fragile items?

No. Fragile and crush-sensitive products should generally be packed in padded mailers or corrugated boxes.

Can poly mailers ship sharp products?

Sharp edges may puncture the plastic and should receive additional protection or be packed in a rigid box.

Are poly mailers opaque?

White poly mailers help conceal the contents during normal shipping conditions, although opacity can vary with lighting and product shape.

Can shipping labels be applied directly to poly mailers?

Yes. Apply labels to a clean, dry and flat area and keep barcodes away from seams and wrinkles.

How do I choose the correct poly mailer size?

Measure the product width, length and thickness, then choose the smallest mailer that allows safe insertion and complete sealing.

Do product dimensions reduce usable space?

Yes. Thick products consume part of the available width and length, so additional clearance may be required.

Can multiple clothing items be placed in one mailer?

Yes, provided the items fit without overloading the seams or preventing the flap from sealing.

Are poly mailers lighter than shipping boxes?

Yes. They are generally much lighter and less bulky than corrugated boxes.

Can poly mailers reduce shipping costs?

Their low weight and compact profile may reduce shipping expenses for suitable products, depending on carrier pricing.

Are poly mailers reusable?

An undamaged mailer may sometimes be reused with new tape or another closure, but the original adhesive strip is generally intended for one use.

Are poly mailers recyclable?

Recycling availability varies. Some polyethylene mailers may qualify for plastic-film recycling where local programs accept them.

What can fit inside a 6" x 9" poly mailer?

A 6" x 9" mailer is suitable for socks, jewelry, cables, accessories and compact soft products.

What can fit inside a 10" x 13" poly mailer?

A 10" x 13" bag is commonly used for T-shirts, leggings, accessories and small apparel orders.

What can fit inside a 14.5" x 19" poly mailer?

This size is suitable for sweaters, jackets, multiple garments and larger soft goods.

What can fit inside a 24" x 36" poly mailer?

A 24" x 36" mailer can hold blankets, bedding, oversized apparel and large textile products.

What is the difference between poly mailers and poly bubble mailers?

Plain poly mailers have no cushioning, while poly bubble mailers include an interior bubble layer for additional protection.

How should poly mailers be stored?

Store them in a clean, dry area away from direct sunlight, excessive heat, sharp objects and heavy pressure.

Does Gpack Supplies sell poly mailers by the case?

Yes. Available case quantities range from 100 to 1,000 mailers depending on the selected size.

Is local pickup available in Miami?

Local pickup and fast delivery options available in Miami and Broward.

Bolsas de envío de polietileno con cierre autoadhesivo

Las bolsas de envío poly mailers son una solución ligera y económica para enviar ropa, accesorios, textiles, uniformes, ropa de cama y otros productos no frágiles.

Gpack Supplies ofrece medidas desde 6" x 9" hasta 24" x 36". Los tamaños pequeños son adecuados para accesorios, medias y prendas compactas, mientras que las medidas grandes pueden utilizarse para chaquetas, cobijas, uniformes y pedidos con varias prendas.

El material de polietileno ayuda a proteger los productos contra humedad ligera, polvo, suciedad y condiciones normales de manipulación. Cada bolsa incluye una tira adhesiva para cerrar el paquete rápidamente sin utilizar cinta adicional.

Aplicaciones principales

• Envíos de ropa y accesorios
• Pedidos de comercio electrónico
• Uniformes y ropa de trabajo
• Textiles, toallas y ropa de cama
• Productos promocionales
• Devoluciones y reemplazos
• Pedidos con varias prendas
• Transferencias entre almacenes y tiendas
• Empaque para tiendas en línea

Para seleccionar la medida correcta, se debe considerar el ancho, el largo y el grosor del producto. La bolsa debe cerrar completamente sin quedar demasiado ajustada ni dejar demasiado espacio vacío.

Los poly mailers no incluyen amortiguación ni protección rígida. Para productos frágiles, afilados, pesados o sensibles a la presión, se recomienda utilizar sobres acolchados o cajas corrugadas.

Local pickup and fast delivery options available in Miami and Broward.