If you’re ready to ditch plastic poly mailers, compostable mailers are one of the best swaps you can make. They look great, perform well, and most importantly — they break down without polluting the planet. But before you make the switch, there are a few things you should know.
Let’s break it all down so you can transition to biodegradable shipping packaging the right way — with zero confusion and maximum impact.
1. What Are Compostable Mailers Made Of?
Unlike traditional plastic, compostable mailers are made from plant-based materials like:
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PLA (corn starch-based bioplastic)
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PBAT (a biodegradable polymer)
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Paper or kraft with water-based coatings
These materials are designed to break down into non-toxic components — typically in industrial composting facilities, and sometimes even at home (if labelled as such).
2. How Do Compostable Mailers Differ from Biodegradable Mailers?
These terms get thrown around a lot, but they’re not the same:
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Biodegradable means the material breaks down over time, but that process can still leave behind microplastics.
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Compostable means it fully decomposes into organic matter under the right conditions, leaving no harmful residue.
If you’re choosing packaging for eco-conscious customers, compostable > biodegradable.
3. Are Compostable Mailers Durable Enough for Shipping?
Yes! Most compostable mailers are water-resistant, tear-resistant, and tough enough for standard shipping — especially for soft goods like clothing, accessories, and books.
But for sharp or heavy products? You’ll want extra protection or a different eco mailer style, like recycled cardboard.
4. How Do You Dispose of Compostable Mailers?
That depends on the certification:
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Home compostable: Toss it into your backyard compost bin (if you have one)
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Industrial compostable: Needs high heat and moisture from a commercial facility
Clear disposal instructions are key. If customers can’t compost it, it might still end up in the trash — defeating the purpose.
5. Which Certifications and Features Should You Check Before Buying Compostable Mailers?
Not all “green” packaging is created equal. When shopping for compostable mailers, look for:
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BPI Certification (USA)
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TÜV Austria or EN 13432 (Europe)
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Clear disposal labels
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Minimal ink printing
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Water-based adhesives
And always check that your mailers align with your country’s biodegradable shipping packaging regulations.
Final Thoughts
Compostable mailers are a powerful upgrade from plastic — but only if you understand what you’re buying and how it fits your business. When used right, they reduce waste, impress customers, and move your brand closer to zero-waste goals.
Looking to stock up? Book a call with our team today. Direct Source Procurement supplies certified compostable mailers that are strong, stylish, and 100% Earth-approved.
FAQs
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What makes a mailer compostable?
Compostable mailers are made from plant-based materials like PLA, PBAT, or kraft paper that fully decompose into non-toxic organic matter under composting conditions. -
Can compostable mailers be used for all types of products?
They work best for soft goods like clothing, books, and accessories. For sharp or heavy items, sturdier options like recycled cardboard may be needed. -
How do I know if a compostable mailer is certified?
Look for certifications such as BPI (USA), TÜV Austria, or EN 13432 (Europe) to ensure the mailer meets compostability standards. -
Are compostable mailers more expensive than plastic mailers?
They can cost slightly more upfront, but they build brand trust, meet eco regulations, and reduce long-term environmental costs. -
What happens if compostable mailers go to landfill?
They may not break down properly without composting conditions, which is why clear disposal instructions for customers are essential.