Are Compostable Bags Really Compostable?

compostable bags
Yes, compostable bags are completely compostable. In contrast to other types of bags, compostable bags are made from natural plant starch, which does not produce any toxic materials. During composting, compostable bags decompose readily due to microbial activity.

Are compostable bags actually compostable?

Yes, they are. As a result of microbial activity in a composting system, compostable bags break down readily. 

Biodegradable bags are often still plastic bags with microorganisms added to break them down.

Compostable products are gaining in popularity, with consumers striving to live a zero-waste lifestyle.

In addition to backyard composting and choosing to use a compost bin over a trash can for organic waste, we can all help do our part by purchasing and using compostable bags for kitchen trash bags, garbage bags, dog poop bags, and even bin liners.

Why you need a compostable trash bag

By composting, compostable bags not only eliminate any type of plastic or waste from landfills, but they also replenish the soil with needed nutrients. 

It is important to note that biodegradable and compostable bags will break down more slowly in landfills than in your home composting system.

Without oxygen, they will produce methane, a much more dangerous greenhouse gas than carbon dioxide. In marine environments, biodegradable bags do not decompose.

The 7 best compostable bags on the market

You can choose from various compostable trash bags from brands such as UNNI, Repurpose, SuperBio, and Envision EcoSafe-6400.

Today you can find several excellent compostable trash bags available.

Here is the list:

1. Repurpose Compostable Trash Bags

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Repurpose offers a wide range of plant-based compostable tableware products.

Their compostable bags are made from sugarcane and beets and are certified compostable by OK compost HOME, possibly the most reputable certification for home composting.

In addition to being free of BPA, phthalates, and other toxins, these bags are also fragrance-free. A star-sealed bottom prevents leaks in both the small and tall sizes of the bags.

2. Hippo Sak Kitchen Bags

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As with the other brands here, Hippo Sak kitchen bags are made of plant-based materials and renewable resources to reduce your carbon footprint.

Additionally, these bags are USDA-certified, making them a sustainable and environmentally friendly option.

The bags are also leak-proof, puncture-resistant, and tear-resistant, making them an excellent choice for various wastes.

3. Reli Compostable Trash Bags

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The Reli compostable trash bags are made from plant-based materials and certified compostable by ASTM D6400. They feature a leak-proof design and are strong enough to handle heavy items without tearing.

If you are looking for an affordable, eco-friendly composting solution, Reli is a good brand to consider.

4. Unni 100% Heavy Duty Compostable Trash Bag

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These are made from plant starch and are completely compostable and biodegradable. These products are certified by the Biodegradable Products Institute (BPI) under US standard ASTM D6400, which means they can be composted in a commercial composting facility easily.

In addition, they are approved by the EPA for use with food, making them safe to use when collecting food waste.

These bags are thick enough to handle heavy items without tearing. Moreover, they are freezer-safe, making them an excellent choice for collecting frozen food waste.

5. SuperBio Compostable Bags

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The SuperBio compostable bags have also been certified compostable by both the US ASTM D6400 standard and the EU EN 13432 standard.

The great thing about these bags is that they contain no plastic residue – everything will degrade into humus, CO2, and water within days when placed in a compost heap.

The 0.76 mil thickness of these bags makes them ideal for lighter items such as newspapers, food waste, and kitty litter.

6. Green Earth Compostable Waste Bags

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In the United States, Green Earth prides itself on the fact that its bags are certified compostable under the ASTM D6400 specification.

As they are made from GMO-free crops, the bags degrade completely in both residential and commercial composting facilities.

The bags are available in small, medium, and large sizes, and all sizes will fit most tall bins. The products should be stored in a cool, dry place and used within one year of purchase.

7. Stout by Envision Ecosafe-6400 Compostable Bags

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The Stout line of compostable bags from Envision is one of the best available on the market for composting.

EcoSafe-6400 compostable bags are designed for composting and collecting organic waste. The products meet the stringent requirements of ASTM D6400 and are USCC and BPI certified.

The bags are also made by visually impaired individuals, making them an eco-friendly and socially responsible choice.


Discovering composting as a way of life or even better, as nature’s way of recycling, Ana dedicates her time to trying out new methods of composting at home. Her goal is to share everything that she’s learned in the hopes that it will help others discover the amazing rewards of composting.

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