Are Natural Mattresses Eco-Friendly & Sustainable? A Life-Cycle Assessment

Are Natural Mattresses Eco-Friendly & Sustainable? A Life-Cycle Assessment

By
Quynh Nguyen

Read Time:17 Minutes

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Amid growing concerns about the health and environmental impacts of synthetic chemicals, the spotlight is shifting toward natural materials in key household items like mattresses. Indeed, plant-based fibers such as hemp, bamboo, and kapok have garnered much attention as sustainable fillings for mattresses. But what about other natural materials used in mattresses? Are all natural mattresses equally sustainable, or are some potentially a bit greenwashed? So, we had to ask: How sustainable are natural mattresses?

The sustainability of natural mattresses depends on the natural fillings used, ranging from unsustainable (conventional cotton) to sustainable (latex, organic cotton, recycled wool). Traditional cotton production, the natural fiber used most often, uses lots of energy and pollutes the environment.

In this article, we’ll walk you through the life-cycle of natural mattresses. Then, we will evaluate their sustainability, potential, and shortfalls. And in the end, we’ll show you some tips for buying sustainable natural mattresses. 

Here’s How We Assessed the Sustainability of Natural Mattresses

Natural mattresses are made from a wide range of natural sources, from animal hair to plant materials. Consequently, their sustainability varies significantly. 

Sustainable: The ability to be maintained at a certain rate or level | Avoidance of the depletion of natural resources in order to maintain an ecological balance”

Oxford Dictionary

To understand the sustainability of natural mattresses, we must assess their life-cycle and each stage’s sustainability. This life-cycle assessment (LCA) is a method to evaluate the environmental impacts of products and materials. Over the years, companies have strategically used LCAs to research and create more sustainable products. So, let’s have a look at the LCA of natural mattresses!

The life-cycle stages of natural mattressesEach stage’s sustainability
Sourcing of natural mattressesIt is sustainable to source plant-based materials, such as natural latex, hemp, or coconut fibers, cultivated in an organic system, for natural mattresses. Plants sequester carbon to lessen the climate crisis. Additionally, some plant materials are highly renewable. However, sourcing animal hair filling for mattresses can have relatively high environmental impacts, especially when compared with plant materials, making these animal-based raw materials less sustainable.
Manufacturing of natural mattressesManufacturing natural mattresses can have a high carbon footprint if energy generation relies heavily on fossil fuels.
Transporting of natural mattressesTransporting can be a carbon-intensive stage in the life-cycle of natural mattresses because of the emissions associated with transporting and delivering vehicles. Natural mattresses typically travel from fields (where the raw materials are cultivated/extracted) to factories and then to sorting centers, shops, and consumers’ homes before going to recycling centers or landfills.
Usage of natural mattressesThe sustainability of using natural mattresses varies depending on their lifespan. In particular, natural latex and wool are highly durable mattress materials, leading to a sustainable usage stage. 
End-of-life of natural mattressesThe end-of-life stage of natural mattresses is sustainable because they are biodegradable and can be recycled. 

Overall, we can say that the sustainability of natural mattresses varies from unsustainable to sustainable. The actual environmental impact of a particular natural mattress depends on some specific factors, especially: 

  • the sourcing of raw materials
  • the (unnecessary) use of harsh chemicals
  • the type of energy used in manufacturing and usage
  • the distance and mode of transportation

Let’s dive deeper into each life-cycle stage and find out how you can buy natural mattresses more sustainably. 

How Sustainable Is the Sourcing of Raw Materials for Natural Mattresses

It is sustainable to source plant-based materials, such as natural latex, hemp, or coconut fibers, cultivated in an organic system, for natural mattresses. Plants sequester carbon to lessen the climate crisis. Additionally, some plant materials are highly renewable. However, sourcing animal hair filling for mattresses can have relatively high environmental impacts, especially when compared with plant materials, making these animal-based raw materials less sustainable.

What Raw Materials Are Used for Natural Mattresses

A natural mattress typically contains a core and a textile cover. 

Natural mattresses can have their core filled with a variety of materials, for example: 

Some manufacturers also position pocket coils in the core to make the natural mattresses more supportive. 

The covers can be made of various natural textile materials, including cotton fabric, hemp fabric, linen fabric, and silk fabric

It is important to note that a natural mattress can contain many components made of various materials. Before making your purchase, you should also look at the sustainability of all the components, from the core to the cover. You can refer to our relevant articles for more information.

In the following section, we’ll discuss cultivating plants and raising animals to extract fibers to fill natural mattresses.

How Does Sourcing Raw Materials for Natural Mattresses Impact the Environment

In this section, we will examine in detail four groups of raw materials commonly sourced for natural mattresses and the sustainability of sourcing such materials. In particular, we will look at: 

  • sourcing cotton fibers as raw materials for natural mattresses
  • sourcing natural latex as raw materials for natural mattresses
  • sourcing sheep wool fibers as raw materials for natural mattresses
How Does Sourcing Cotton Fibers for Natural Mattresses Impact the Environment

Sourcing fibers from the conventional cotton crop is mostly unsustainable because cotton plants are water-thirsty and require a high input of agrochemicals for a reasonable fiber yield. However, sourcing organic cotton fibers for mattresses can be sustainable because organic farming can benefit the health of the soil, the ecosystem, and cotton growers. Also, cotton plants sequester carbon as they grow. 

The General Environmental Impacts of Growing Conventional Cotton Crops for Fibers Used in Natural Mattresses 

  • High water footprint 

Cotton is a thirsty crop. The global average water footprint for cultivating and ginning (i.e., separating the cotton fibers from the seeds) is 2,235 m3 (for 1,000 kg of cotton fibers). 82% of this water volume (2,235m3) is for irrigation. In comparison, fiber crops such as hemp or bamboo don’t require irrigation (only rainwater). Diluting pesticides is another source of water consumption at this stage. 

  • The widespread use of pesticides in conventional cotton cultivation 

Cotton plants are vulnerable to various pests, including insects, worms, fungi, and bacteria. Specifically, several hundred species of insects attack cotton crops. Because of the need to control the damage caused by pests, conventional cotton farmers use a disproportionate amount of chemical pesticides. 

  • Dependent on synthetic fertilizer 

The common monoculture practices in cotton cultivation deplete nutrients in the soil, resulting in fertilizers being necessary. Heavy use of chemical-based fertilizers leads to fertilizer run-off disrupting the ecosystems and a high carbon footprint. 

The Various Locations Where Cotton Fibers Can Be Sourced as Raw Materials for Natural Mattresses

There are cotton crops in over 80 countries, but the biggest producers of cotton fibers are India, China, Pakistan, Brazil, and Uzbekistan. 

The high water demand and excessive use of chemicals in cotton cultivation cause several environmental and social challenges in places where cotton cultivation dominates the land. Some specific challenges are as follows:

Sourcing Sustainable Cotton Fibers as Raw Materials for Natural Mattresses

It is important to note that not all cotton fibers are made equally (bad). Though conventional cotton is ranked class E, the least sustainable fiber class, recycled cotton fiber belongs to class A, which is deemed the most sustainable fiber class, according to Common Objective’s Made-By Environmental Benchmark for Fibres. 

Organic cotton is also a highly sustainable filling for mattresses. 

Here are some various forms of cotton fibers (that can be used as raw materials for natural fabrics), in the general order from the most sustainable (at the top) to the least sustainable (at the bottom)

  1. Recycled cotton: Mechanically recycled from pre- or post-consumer waste.
  2. Organic cotton: Grown without synthetic fertilizer and pesticides.
  3. In-transition cotton: Moving away from unsustainable practices to more sustainable ones. This group of cotton fabrics includes:
    1. In-conversion cotton
    2. Better Cotton Initiative (BCI) cotton
    3. Cleaner Cotton™
    4. Fairtrade cotton 
  4. Conventional cotton

Sourcing More Sustainable Vegetable-Based Cellulose Fibers for Natural Mattresses

Various sustainable plant cellulose fibers can be sourced for natural mattresses These include hemp, kapok, coconut coir, and bamboo. Sourcing these fibers is sustainable because these crops generally require little to no irrigation and agrochemicals to grow while having the environmental benefits of carbon sequestration as they grow. 

More Information on Sourcing Plant-Based Fibers as Raw Materials for Natural Fabrics 

How Does Sourcing Natural Latex for Natural Mattresses Impact the Environment

Tapping the sap of rubber trees to make latex is generally sustainable thanks to the plant’s carbon sequestration potential and renewability.

The General Environmental Impacts of Tapping Rubber Trees for Raw Materials Used in Natural Mattresses 

  • Carbon Sequestration
    As rubber trees grow, they absorb CO2 from the atmosphere while releasing oxygen. During their long lifespan of up to 100 years, they act as a carbon sink, taking greenhouse gasses out of the atmosphere and helping to mitigate the climate crisis
  • Renewability
    Tapping the rubber tree for sap doesn’t kill the tree. When a rubber tree is big enough, generally at around 6 years of age, its sap can be harvested sustainably for natural latex. This process is called tapping and can be done multiple times a day for many years. 

The Various Locations Where Natural Latex Can Be Sourced as Raw Materials for Natural Mattresses

The rubber tree, Hevea brasiliensis, is native to rainforests in the Amazon region of South America, including Brazil, Venezuela, Ecuador, Colombia, Peru, and Bolivia. Today, there are commercial rubber plantations in many parts of Southeast Asia and Western Africa, predominantly in Thailand, Indonesia, Malaysia, Vietnam, and Nigeria

Rubber trees can be cultivated sustainably for latex while increasing biodiversity and alleviating the climate crisis via carbon sequestration. However, the rubber industry is known for its link with deforestation and land grabbing in biodiverse areas as well as human and labor rights violations, especially with unorganized small-scale farms. 

Sourcing Sustainable Natural Latex as Raw Materials for Natural Mattresses

It is important to note that sourcing plant materials can be even more sustainable when the farming systems are organic because no toxic chemicals are involved in cultivation. Consequently, organic latex is a more sustainable material than natural latex in sourcing for natural mattresses. 

How Does Sourcing Sheep Wool Fibers for Natural Mattresses Impact the Environment

Sheep wool fabrics are made with animal fleece, which is generally considered a renewable resource. However, this raw material bears the environmental impacts of raising sheep, including global warming, land degradation, and biodiversity loss. 

The General Environmental Impacts of Sheep Farming for Natural Fibers Used in Natural Mattresses

The one sustainable aspect of sheep wool sourcing is renewability. 

A sheep can produce a significant amount of fibers per fleece and repeated harvest throughout its relatively long lifespan. 

  • The fleece of a sheep can be ready for collection every few months. For example, farmers can shear sheep of certain breeds as frequently as every 2 to 3 months.
  • On average, each sheep yields about 10 lbs of wool a year, enough for about 6 sweaters. 
  • A sheep lives from 10 to 12 years. And in the case of the merino breed, the sheep will be able to produce enough wool for over 100 garments containing around 1 lb each. (Note that merino sheep breeds tend to have a higher fiber yield.)

It’s noteworthy that the renewability of fibers from sheep fleece is also thanks to their population: There are about 1.2 billion sheep worldwide, spreading over upland habitats on all continents. 

However, sourcing sheep wool for natural mattresses has several adverse environmental impacts. 

The Various Locations Where Wool Fibers Can Be Sourced as Raw Materials for Natural Mattresses

The wool industry produces around 1,949 million kg (2021) of raw wool from a global flock of approximately 1.2 billion sheep

The top producers of wool fibers are Australia, China, and New Zealand. Australia is the world’s most important sheep-rearing nation and is home to more than 71 million sheep

The greenhouse gas emissions and land degradation cause several environmental and social challenges in places where sheep farming dominates the land. Some specific challenges are as follows:

Sourcing Sustainable Sheep Wool Fibers as Raw Materials for Natural Fabrics 

It is important to note that the above-mentioned adverse environmental impacts often come from worst-case scenarios for sheep farming. These may include the following:

  • The high density of sheep on pasture lands.
  • Overgrazing.
  • Failure to handle agricultural waste properly.

However, organic and/or regenerative farming practices don’t damage the land—rather, they help restore it, allowing sheep wool to be sourced sustainably. 

Additionally, sourcing recycled wool is also sustainable as it utilizes waste and bypasses the farming step. 

The Common Objective ranks recycled wool fiber in class A—the most sustainable category of fibers—in their Made-By Environmental Benchmark for Fibres. In contrast, conventional wool is ranked a class E fiber among the least sustainable fibers. 

More Information on Sourcing Wool Fibers as Raw Materials for Natural Fabrics 

Related: Are you interested in learning more about the environmental impact of sourcing various types of wool fibers? Check it out in the following article: 

How Sustainable Is the Manufacturing of Natural Mattresses

Manufacturing natural mattresses can have a high carbon footprint if energy generation relies heavily on fossil fuels. 

The typical process of manufacturing natural mattresses includes the following steps: 

  1. Construct the core: The core can be made with multilayers of naturally occurring fibers or natural latex foam. Steel coils are sometimes used in the core of natural mattresses.
  2. Cover the core with a textile material.

Let’s now dive into a few key sustainable issues of this life-cycle stage.

Manufacturing Certain Types of Natural Mattresses Uses a Lot of Energy

The energy demand for natural mattress manufacturing depends largely on the materials used in the core. Some of the most energy-intensive materials used in natural mattresses include natural latex and wool. If metal coils are added to increase support, the energy use will go up accordingly. 

If and when manufacturing relies heavily on fossil fuels, high energy consumption could have serious knock-on ecological impacts. Using renewable energy (solar, wind, hydroelectric, geothermal, and biomass) would significantly reduce carbon emissions at this stage. 

The Environmental Impacts of Natural Occurring Fiber Extracting Varies Depending on the Fiber and the Extraction Method

Here are two examples on the opposite ends of the sustainability spectrum: 

  • Sustainable: Extracting hemp fibers using biological retting requires no extra energy, chemicals, or fresh water.
  • Unsustainable: Collecting and scouring wool fiber requires a great deal of water and cleaning agents, which could lead to freshwater contamination. 

Manufacturing Certain Types of Natural Mattresses Use Synthetic Chemicals 

The chemical usage for natural mattress manufacturing depends largely on the materials used in the core. Manufacturers could use various synthetic chemicals to process certain natural fibers, such as bamboo and cotton

On the other hand, manufacturing some raw materials for natural mattresses, such as organic cotton and natural latex, doesn’t involve toxic chemicals and is thus more environmentally friendly. 

How Sustainable Is the Transportation of Natural Mattresses

Transporting can be a carbon-intensive stage in the life-cycle of natural mattresses because of the emissions associated with transporting and delivering vehicles. Natural mattresses typically travel from fields (where the raw materials are cultivated/extracted) to factories and then to sorting centers, shops, and consumers’ homes before going to recycling centers or landfills. 

In the life-cycle of natural mattresses, transportation typically occurs as below: 

  • From fields where the raw materials are cultivated/extracted to the processing factories where the raw materials are turned into mattress fillings.
  • From the mattress filling manufacturing location to the natural mattress manufacturing location.
  • From the natural mattress manufacturing location to sorting centers/physical shops.
  • From sorting centers/physical shops to the consumer’s home.
  • From the consumer’s home to the centers for recycling/disposing of.

Traveling Distances of Natural Mattresses Vary Depending on Their Country of Origin

It is uncommon for natural mattresses to have raw materials grown, processed, and sold in one town, country, or even continent. 

Here are some scenarios for transporting natural mattresses: 

  • Farmers grow coconut coir in India, which is sourced and shipped to a manufacturer locally. Coconut coir-filled natural mattresses are then transported globally to be sold to consumers.
  • Organic cotton fibers are harvested from fields in India and transported to Brazil for batting production. Organic cotton-filled natural mattresses are then sold to the US market. 
  • Rubber trees can be planted and harvested in Vietnam. The natural latex is transported to a factory nearby for latex-based natural mattress production and then around the world for retailing. 

You can reduce the transporting carbon footprint by choosing natural mattresses that travel a shorter distance from the fields and are made closer to your home.

The Carbon Footprint of Transporting Natural Mattresses Depends Largely on the Vehicle of Transportation 

During its life-cycle, a natural mattress can be transported using various types of vehicles, including: 

  • large container ships 
  • planes 
  • freight trains 
  • long-distance trucks 
  • short-distance delivering vans 

And these various types of transportation vehicles have different carbon footprint impacts, as follows: 

To reduce the carbon footprint of your purchase as a consumer, you can choose not to pick a fast delivery option when ordering your natural mattresses. 

How Sustainable Is the Usage of Natural Mattresses

The sustainability of using natural mattresses varies depending on their lifespan. In particular, natural latex and wool are highly durable mattress materials, leading to a sustainable usage stage. 

The lifespan of natural mattresses varied widely, depending on the frequency of use, the level of care, and the materials. 

While a natural mattress with a natural latex core can last 15 to 20 years, a natural mattress filled with entry-level cotton battings only lasts 2 to 8 years

Durability in mattresses means consumers don’t need to replace them too frequently, reducing waste generation and conserving resources. 

How Sustainable Is the End-of-Life of Natural Mattresses

The end-of-life stage of natural mattresses is sustainable because they are biodegradable and can be recycled. 

Plant-based and animal-based materials used in natural mattresses are biodegradable, so when natural mattresses reach the end of their lifespan, they break down naturally, returning to the earth without leaving a significant environmental footprint.

How Circular Are Mattresses Made of Natural Materials

As a principle, products made with one type of material, such as 100% wool fibers, are easier to disassemble and recycle than products made with a blend of materials. 

The circular economy is a system where materials never become waste and nature is regenerated. In a circular economy, products and materials are kept in circulation through processes like maintenance, reuse, refurbishment, remanufacture, recycling, and composting. The circular economy tackles climate change and other global challenges, like biodiversity loss, waste, and pollution, by decoupling economic activity from the consumption of finite resources.

Ellen Macarthur Foundation 

Mattresses are bulky waste that take up significant space in landfills—often for a long time, too. It is, in principle, possible to produce recyclable and circular natural mattresses. 

Why Is It Important to Buy Mattresses Made of More Sustainable Materials

It is important to buy mattresses made of more sustainable materials because such materials generally have lower carbon footprints, put less pressure on natural resources, and are safer for both consumers and workers. 

Buying Mattresses Made of More Sustainable Materials Reduces Toxic Chemicals In Your Sleeping Environment 

Many mattresses are made with synthetic materials in chemical-intensive processes, exposing factory workers and end users to health risks, especially regarding the respiratory system. For example, one memory foam model was found to emit 61 volatile organic compounds (VOCs), including the known carcinogens benzene and naphthalene. 

In contrast, mattresses made of more sustainable materials, such as plant-based latex or organic wool, are generally safer, as they don’t contain toxic chemicals and are produced in more responsible processes. 

Buying Mattresses Made of More Sustainable Materials Reduces Your Carbon Footprint 

Conventional synthetic materials used in mattresses are fossil-derived and, thus, have a high carbon footprint. On the other hand, mattresses made with more sustainable materials, either organic or recycled, have relatively low carbon footprints. 

Buying Mattresses Made of More Sustainable Materials Reduces Demand for Natural Resources and Waste Management

Buying mattresses made with more sustainable materials, such as organic or recycled ones, means that you can avoid fossil-derived mattress foams, which contribute to the depletion of nonrenewable resources. 

Additionally, using organic materials for mattresses lessens the pressure on landfill space. On that note, keep the following in mind:

Considering that synthetic materials don’t break down for hundreds of years, opting for organic mattresses that are biodegradable and recyclable is a great idea, as these mattresses significantly lower the pressure on landfills.

Buying Mattresses Made of More Sustainable Plant-Based Materials Encourages Sustainable Management of Forests and Ecosystems

Sustainable plant-based mattress materials, such as bamboo and coconut coir, are made with raw materials from forests and plantations that are sustainably managed. 

When you buy sustainable plant-based materials, you discourage unsustainable practices like clearing biodiverse forests for cattle raising. Furthermore, you help reduce deforestation, biodiversity loss, and the effects of climate change. 

Final Thoughts

Natural mattresses are made from a wide range of natural sources, from animal hair to plant materials. Consequently, their sustainability varies significantly. Natural mattresses made with plant-derived materials are the most sustainable varieties because the raw materials are often easily renewable and have the climate benefits from the plant’s sequestration potential, while the end products are biodegradable. On the other hand, natural mattresses made with animal-derived materials obtained from conventional farming systems are not as sustainable because of the high impacts of their sourcing. 

No matter what, to make your use of natural mattresses even more sustainable, follow these steps:

  1. Buy recycled, upcycled, or circular natural mattresses.
  2. Keep your natural mattress for as long as possible.
  3. At the end-of-life of your natural mattress, upcycle the material to extend its usage and arrange for it to be recycled or properly disposed of.

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