What Do Mattress Certifications Actually Mean? CertiPUR, OEKO-TEX, and B Corp Explained
Mattress product pages are full of certification logos. CertiPUR®. OEKO-TEX®. B Corp™. FSC. They sit in the footer like badges of honour, and most buyers scroll past them without knowing what any of them actually verify. This matters, because some certifications test the product itself, some test the business behind it, and some test the raw materials, and confusing them means you might be reassured by a logo that doesn't address the thing you actually care about.
Here's what each one means, what it tests, and why it should (or shouldn't) influence your buying decision.
CertiPUR®: What's in the Foam?
CertiPUR® is a voluntary certification programme that tests polyurethane foam for harmful substances and emissions. If a mattress carries CertiPUR® verification, it means the foam inside has been independently tested and confirmed to be:
- Made without ozone-depleting chemicals
- Made without heavy metals like mercury and lead
- Made without formaldehyde
- Made without prohibited phthalates
- Low in volatile organic compound (VOC) emissions, measured within safe limits
This matters because polyurethane foam is a synthetic material produced through chemical processes, and lower-quality foams can contain residual chemicals that off-gas into your bedroom air. CertiPUR® doesn't certify that the foam is organic or natural; it certifies that the foam meets specific safety standards for chemical content and emissions.
All foams in Simba's high-quality beds for better sleep are CertiPUR® verified. This includes the Simbatex® graphite-infused open-cell foam in the comfort layer, the support base foam, and any additional foam layers across the range.
OEKO-TEX® Standard 100: Is the Fabric Safe?
OEKO-TEX® Standard 100 is an independent testing and certification system for textiles. It tests the finished product, not just the raw materials, for over 100 harmful substances including:
- Azo dyes and allergenic dyes
- Formaldehyde
- Pesticides and herbicides
- Heavy metals
- Chlorinated phenols
- Phthalates
The certification covers every component of the textile that comes into contact with your skin, including the fabric, the thread, the dye, and any chemical finishes applied during manufacturing. For a mattress, this typically applies to the cover fabric and any textile layers at the sleep surface.
For allergy sufferers and anyone with chemical sensitivities, OEKO-TEX® is one of the most relevant certifications to look for, because it directly addresses what you're sleeping on and against.
B Corp™: Is the Business Responsible?
B Corp certification is fundamentally different from CertiPUR® and OEKO-TEX® because it certifies the company, not the product. Awarded by the non-profit B Lab, it assesses a business across five categories:
- Governance: Transparency, ethics, and accountability in how the company is run
- Workers: Employee welfare, compensation, diversity, and working conditions
- Community: Impact on the communities where the company operates, including supply chain practices
- Environment: Resource use, emissions, waste management, and environmental stewardship
- Customers: Product quality, data privacy, and customer stewardship
To achieve certification, a company must score at least 80 out of 200 on the B Impact Assessment. The median score for businesses that take the assessment is 50.9. Simba scored 97.5, placing us at the Gold Standard benchmark and making us the UK's first B Corp certified sleep brand.
B Corp doesn't tell you whether the mattress foam is safe or whether the fabric is chemical-free. It tells you whether the company behind the product operates responsibly across every dimension of its business. For buyers who care about ethical sourcing, environmental impact, and corporate accountability, it's the most comprehensive single indicator available.
FSC: Where Does the Wood Come From?
FSC (Forest Stewardship Council) certification applies to wood and timber products. It verifies that the wood is sourced from forests managed according to strict environmental, social, and economic standards. This includes protecting biodiversity, respecting indigenous peoples' rights, and maintaining the long-term health of the forest ecosystem.
For mattresses, FSC certification is relevant to the bed frames rather than the mattress itself. Almost all of Simba's bed frames are made using FSC-certified timber, which means the wood comes from responsibly managed sources rather than from deforestation or unsustainable logging.
Which Certifications Should You Care About?
It depends on what matters to you:
- Health and chemical safety: CertiPUR® (foam) and OEKO-TEX® (textiles) are the most directly relevant
- Environmental and ethical impact: B Corp provides the broadest assessment of company-wide responsibility
- Sustainable sourcing: FSC certifies responsible forestry for bed frame timber
- Child safety: BS EN 16890 is the UK safety standard for cot and crib mattresses, covering firmness, flatness, and structural safety
A mattress that carries all of these certifications has been tested at the product level, the material level, and the company level. Each certification addresses a different concern, and together they provide a comprehensive picture of what you're buying and who you're buying it from.
FAQs
No. CertiPUR®, OEKO-TEX®, and B Corp are all voluntary. Fire safety standards (BS 7177) are mandatory for mattresses sold in the UK, and BS EN 16890 is mandatory for cot mattresses, but the environmental and chemical certifications are opted into by manufacturers.
Yes. They test different components. A mattress with CertiPUR® verified foam may have a cover that hasn't been OEKO-TEX® tested. Look for both if you want assurance across the entire mattress, foam and fabric.
Phthalates are plasticisers used to increase flexibility in synthetic materials. Certain phthalates are classified as harmful to human health and are prohibited in consumer products in the EU and UK. CertiPUR® verifies that the foam doesn't contain these specific prohibited compounds.
No. B Corp companies are for-profit businesses that meet rigorous standards of social and environmental performance. The certification verifies that the company balances profit with purpose, not that it operates as a non-profit.
They guarantee specific things: chemical safety, fabric safety, responsible business practices, or sustainable sourcing. They don't guarantee comfort, which is subjective and depends on the mattress's construction matching your body and sleep style. A certified mattress can still be the wrong mattress for you; certifications reduce risk, they don't eliminate personal preference.
