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. Compostable vs. Biodegradable — What’s the Difference?
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. What to Look for When Choosing a Compostable Mailer
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? Direct Source Procurement supplies certified compostable mailers that are strong, stylish, and 100% Earth-approved.
