Poly Bags in St. Louis, MO
St. Louis is the Gateway City and one of the Midwest's great commercial centers — home to a world-class biotech corridor in the Cortex Innovation Community, a craft beer heritage that stretches from Anheuser-Busch through a thriving craft brewing scene, major corporate headquarters including Emerson Electric and Peabody Energy, a nationally recognized food scene in the Hill and Cherokee Street neighborhoods, and a growing cannabis market. My Custom Boxes serves St. Louis' diverse and commercially ambitious business community with premium custom packaging across every category.
Why St. Louis Businesses Choose Us
Why Choose Our Poly Bags
Custom Poly Bags | E-Commerce Mailers, Garment Bags & Retail Packaging
Poly bags — polyethylene packaging bags — are the most widely produced flexible packaging format globally, serving the broadest range of packaging applications from e-commerce garment shipping to industrial parts containment to retail product packaging. Their combination of low cost, lightweight, waterproof protection, and printability makes them the default packaging solution for applications where premium presentation is secondary to practical protection and cost efficiency.
Poly Bag Applications
- E-Commerce Mailer Bags: Self-seal poly mailer bags for apparel, soft goods, and lightweight product e-commerce shipping — the dominant e-commerce shipping format by volume
- Garment Bags: Clear poly bags for garment storage and retail display — protecting clothing from dust while maintaining visibility
- Retail Poly Bags: Printed poly bags for retail checkout and shopping bag applications
- Industrial Parts Bags: Heavy-gauge poly bags for industrial component storage, kitting, and parts packaging
- Agricultural Bags: Large-format poly bags for soil, mulch, fertilizer, and seed retail packaging
Poly Bag Material Grades
Low-density polyethylene (LDPE) is the standard poly bag material — flexible, clear to semi-clear, and suitable for most standard applications. Linear low-density polyethylene (LLDPE) provides higher tensile strength and puncture resistance for heavier applications. High-density polyethylene (HDPE) provides stiffer, more rigid properties for retail bags and agricultural applications. Recycled content LDPE and bio-based PE are available for brands with sustainability requirements.
Poly Mailer Bags vs. Corrugated Mailers for E-Commerce
Poly mailer bags and corrugated mailer boxes serve the same e-commerce shipping function with different trade-offs. Poly mailers are lighter (reducing shipping weight charges), waterproof (providing rain protection corrugated cannot match), lower cost per unit, and more compact in storage and handling. Corrugated mailers provide structural protection that poly mailers cannot — they prevent crushing of rigid contents and provide unboxing experience branding that poly bags cannot match. The correct choice depends on the product: soft goods (apparel, textiles, flat goods) are well-served by poly mailers; structured, rigid, or fragile products require corrugated.
Sustainable Poly Bag Alternatives
Standard LDPE poly bags are not recyclable in standard curbside programs, though most major grocery retailers accept store drop-off recycling for LDPE bags. Sustainable alternatives include recycled content LDPE (using post-consumer waste polyethylene), bio-based PE (polyethylene made from sugarcane ethanol rather than petroleum), and certified compostable PBAT/PLA blend bags. For brands with sustainability requirements, we provide documentation of recycled content percentage and bio-based content certification for sustainable poly bag specifications.
Quick Specs
- Minimum Order
- 100 units
- Production Time
- 2-3 weeks
- Free Shipping
- Yes
- Printing
- CMYK / Pantone
- Location
- St. Louis, MO
Industries
Industries in St. Louis
Affordable sample kits available
Industries We Serve in St. Louis
We provide poly bags to a wide range of industries in St. Louis, MO.
Popular Box Styles in St. Louis
Other packaging styles popular with St. Louis businesses.
Available Finishes
Enhance your poly bags with premium finishes.
Poly Bags in Nearby Cities
We deliver to cities across Missouri.
More Packaging in St. Louis
Explore more packaging categories available in St. Louis, MO.
Cardboard Boxes
Versatile, lightweight, and recyclable cardboard packaging for retail, food, and e-commerce brands
Corrugated Boxes
Heavy-duty corrugated boxes engineered for shipping protection and branded e-commerce unboxing
Rigid Boxes
Premium rigid boxes with magnetic closures and luxury construction for high-end product packaging
Folding Cartons
Precision-engineered folding cartons for consumer goods, food, and pharmaceutical retail packaging
Mailer Boxes
Custom mailer boxes designed for e-commerce unboxing experiences and subscription packaging
Gift Boxes
Elegant custom gift boxes with premium finishes for corporate gifting, retail, and seasonal occasions
Poly Bags in St. Louis — FAQs
What is a self-seal poly mailer bag?
Self-seal poly mailer bags have an adhesive strip protected by a release liner. After product insertion, the liner is removed and the adhesive strip is pressed to the bag body — creating a secure seal without tape. Most self-seal mailer bags also include a second adhesive strip for return shipping — the customer tears open the bag along a perforation and uses the second strip to reseal it for returns.
What thickness poly bag do I need?
Standard poly bags for retail and light-duty applications use 1.5–2 mil LDPE. E-commerce poly mailer bags use 2.5–3 mil LLDPE for better puncture resistance during parcel handling. Heavy-duty industrial bags use 4–6 mil LDPE or LLDPE. Agricultural bags use 4–8 mil HDPE for UV stability and load-bearing capacity.
Can poly bags be printed?
Yes. Poly bags are printed using flexographic printing in 1–6 spot colors on the outer surface. Full CMYK poly bag printing is available at higher minimum quantities. Branded poly mailer bags with logos, brand colors, and return address information are standard for e-commerce brands.
Are recycled content poly bags available?
Yes. We offer poly bags in 30%, 50%, and 100% post-consumer recycled LDPE content. Recycled content bags are certified by the supplier with documented PCW (post-consumer waste) content percentage. Bio-based PE from sugarcane ethanol is also available for brands preferring renewable-source plastics over petroleum-based materials.
Do you serve St. Louis' Cortex biotech and innovation community?
Yes. Cortex-connected startups and biotech companies use our professional packaging with our startup-accessible 100-unit minimum.
What St. Louis metro areas do you deliver to?
We deliver free throughout St. Louis City and County, plus O'Fallon, St. Charles, Chesterfield, Clayton, and all surrounding metro communities.
Do you serve St. Louis' craft brewing community?
Yes. St. Louis' craft breweries use our retail boxes, gift packaging, and branded mailers for retail and taproom operations.
How long does delivery take to St. Louis?
Production is 10–14 business days from proof approval, then 2–3 days ground shipping to St. Louis.
Get Poly Bags in St. Louis, MO
Get a free quote with competitive pricing, free shipping, and 2-3 week turnaround.