OEKO-TEX STANDARD 100 and GREENGUARD Gold are both useful certifications, but they answer different questions.
OEKO-TEX STANDARD 100 focuses on substances found in textiles and related materials. GREENGUARD Gold focuses on chemicals released from a product into indoor air.
For a crib mattress, sheet, protector, or removable cover, neither label is automatically “better.” The more useful certification depends on what part of the product is certified and what you want verified. A product can also hold both certifications because the testing areas complement each other.
OEKO-TEX vs. GREENGUARD Gold at a Glance
The GREENGUARD Gold crib mattress guide explains the emissions scope and the limits of the label.
| Certification | Main focus | What is tested | Most useful when checking |
|---|---|---|---|
| OEKO-TEX STANDARD 100 | Harmful substances in materials | Textiles, foams, accessories, and other covered components or finished articles | Sheets, fabric covers, mattress materials, protectors, and textile accessories |
| GREENGUARD Gold | Chemical emissions into indoor air | Emissions released from the certified product under controlled test conditions | Finished mattresses, furniture, flooring, nursery products, and other indoor items |
| Both certifications | Material testing plus emissions testing | Different parts of the product’s chemical profile | Products where you want broader third-party verification |
This comparison assumes the OEKO-TEX claim refers to OEKO-TEX STANDARD 100. OEKO-TEX operates several programs, so the exact label name matters.
What Is OEKO-TEX STANDARD 100?
OEKO-TEX STANDARD 100 is a certification for textiles and related materials tested for specified harmful substances.
The program can cover items at different stages of production, from fibers and fabric to accessories and finished products. Its stated scope can also include mattresses, foams, upholstery, feathers, and similar materials. The testing plan depends on the article, its materials, its intended use, and the applicable product class.
A certified article must meet the program’s limits for the substances included in its criteria. OEKO-TEX says its testing list covers more than 1,000 substances and that its limits are reviewed at least annually.
What do the OEKO-TEX product classes mean?
STANDARD 100 has four product classes based on how an item is expected to be used.
Product Class I applies to articles intended for babies and children up to 36 months. It has the program’s strictest requirements and limit values. Product Class II covers products with direct skin contact, while Classes III and IV cover products with less skin contact or decorative uses.
For baby bedding, shoppers often look for Product Class I. However, do not assume every mattress, mattress component, or crib sheet automatically falls under that class. Check the certificate and its stated scope.
Does OEKO-TEX cover every part of a crib mattress?
Sometimes, but not always.
A claim may apply to:
- The complete finished mattress
- The outer fabric
- A removable mattress cover
- The foam
- Thread, labels, zippers, or other components
- A group of materials used by the manufacturer
That difference matters. “Made with OEKO-TEX certified fabric” is not the same claim as “the finished mattress is OEKO-TEX STANDARD 100 certified.”
OEKO-TEX requires the components included within a certified article’s scope to meet the applicable criteria. Its standard also explains that certificate scope can cover particular articles, materials, production stages, or component groups.
When comparing products, ask a plain question: What exactly does the certificate cover?
What Is GREENGUARD Gold?
GREENGUARD Gold is a chemical-emissions certification operated by UL Solutions.
It evaluates the amount of certain volatile organic compounds, or VOCs, emitted by a product into indoor air under specified laboratory conditions. VOCs are chemicals that can enter the air as gases from materials, finishes, adhesives, and other product components.
GREENGUARD Gold uses lower emissions limits than the standard GREENGUARD certification. UL describes the Gold level as intended for environments where sensitive groups may spend time, including homes, schools, healthcare facilities, and spaces used by children. It sets limits for individual VOCs and total chemical emissions and includes additional requirements connected with the California Department of Public Health emissions-testing method.
What does GREENGUARD Gold tell you about a crib mattress?
When the finished crib mattress is listed as GREENGUARD Gold certified, the claim generally tells you that the tested product met the program’s chemical-emissions limits.
This is different from testing a fabric sample for substances contained in the material. GREENGUARD Gold is concerned with what the product releases into the surrounding air during the test.
UL states that certified products are subject to manufacturing-process review and continued testing requirements. Shoppers can look for current certified-product listings through UL’s SPOT database rather than relying only on a retailer badge or a product-page sentence.
Does GREENGUARD Gold mean zero VOCs?
No.
“Low emissions” does not mean “no emissions.” GREENGUARD Gold sets limits for the chemicals and emissions covered by the program. It does not certify that a product contains no chemicals or releases absolutely nothing into the air.
This is one reason terms such as “chemical-free” should be treated cautiously. Everything is made of chemicals, including cotton, water, and air. A specific, current certification is more useful than a sweeping marketing phrase.
The Biggest Difference: Content Testing vs. Emissions Testing
The low-VOC crib mattress guide separates emissions language from odor, materials, and complete-product safety claims.
The easiest way to understand these certifications is to think about two separate questions.
OEKO-TEX asks what may be present in the material
STANDARD 100 tests covered textiles, accessories, and related materials against its limits for specified substances.
This can be especially relevant for items that touch the child or are handled frequently, such as:
- Fitted crib sheets
- Mini-crib sheets
- Removable mattress covers
- Mattress protectors
- Sleep sacks
- Fabric playard accessories approved by the manufacturer
The exact certificate still controls the claim. A certified zipper or fabric panel does not automatically certify the whole product.
GREENGUARD Gold asks what the product releases into the air
GREENGUARD Gold evaluates chemical emissions from the product under defined testing conditions.
This can be especially useful for larger indoor products such as:
- Crib mattresses
- Toddler mattresses
- Cribs
- Dressers
- Nursery chairs
- Flooring
- Paint and building materials
A finished mattress can contain many materials, including fabric, foam, adhesives, waterproof layers, labels, and structural parts. An emissions certification looks at the certified product’s emissions rather than treating one material claim as a stand-in for the entire construction.
Which Certification Is Better for a Crib Mattress?
Neither certification is universally better.
For a finished crib mattress, GREENGUARD Gold may provide more direct information about chemical emissions from the whole certified product. OEKO-TEX STANDARD 100 may provide more detailed assurance that the certified materials or finished article met limits for the substances covered by that program.
The strongest claim is not always the logo that sounds most impressive. It is the claim with the clearest scope.
Consider these examples:
Example 1: Certified mattress fabric only
A mattress description says its outer fabric is OEKO-TEX certified.
That can be useful information about the fabric. It does not automatically verify the foam, waterproof barrier, adhesive, inner core, or entire finished mattress.
Example 2: Finished mattress is GREENGUARD Gold certified
The exact mattress model appears in UL’s current certification database.
That gives you information about emissions from the listed product. It does not tell you that every material is organic, that the cover is waterproof, or that the mattress will fit your crib.
Example 3: Finished mattress has both certifications
The mattress has a valid GREENGUARD Gold listing and a STANDARD 100 certificate that clearly covers the finished article.
The two labels address different issues. One does not cancel out or duplicate the other.
What Neither Certification Proves
Certification labels are useful only when kept within their actual limits.
Neither OEKO-TEX STANDARD 100 nor GREENGUARD Gold, by itself, proves that a crib mattress is:
- The correct size for your crib
- Firm enough for infant use
- Approved for a mini crib, playard, or travel crib
- Organic
- Made only from natural materials
- Free of all chemicals
- Waterproof
- Hypoallergenic
- More comfortable
- More durable
- Easier to clean
- Able to prevent SIDS, suffocation, allergies, or other medical conditions
OEKO-TEX’s current STANDARD 100 document specifically states that the label is not a general quality label and does not determine fitness for use, performance after cleaning, burning behavior, construction safety, or compliance with unrelated product-safety requirements.
GREENGUARD Gold is similarly limited to its emissions-certification scope. Low emissions are not a substitute for crib-mattress fit, firmness, construction, labeling, or compatibility requirements.
Certification Does Not Replace Crib-Mattress Safety Checks
For infant sleep, start with the sleep surface itself.
A crib mattress should be firm, flat, and tight-fitting in the exact crib for which it is being used. The U.S. Consumer Product Safety Commission advises using a firm, tight-fitting crib mattress and a fitted bottom sheet made for crib use.
In the United States, crib mattresses are also subject to federal requirements that address matters such as firmness, fit, and structural hazards. Those requirements are separate from voluntary certifications dealing with substances or emissions.
Before buying or reusing a mattress:
- Identify the exact crib or mini-crib model.
- Read the crib manufacturer’s mattress requirements.
- Confirm that the mattress manufacturer lists the intended sleep-space type.
- Check the mattress label and instructions.
- Check current recall information.
- Confirm that the mattress fits firmly and leaves no unsafe gap.
- Use only a smooth, snug fitted sheet approved for that mattress and sleep space.
A wall of certification badges cannot fix a poor fit. Logos are talented, but they cannot perform carpentry.
Special Rules for Playards and Travel Cribs
Do not use crib-mattress certifications as permission to add a different mattress to a playard or travel crib.
The controlling rule is the sleep-space manufacturer’s instructions. Many playards and travel cribs are designed to be used only with the original supplied sleep surface or a specifically approved replacement.
An aftermarket mattress can change the height, fit, firmness, folding behavior, or gap around the sides. Even a mattress with OEKO-TEX or GREENGUARD Gold certification may be unsuitable for that particular product.
Do not add extra padding, toppers, folded blankets, foam inserts, or an unapproved second mattress to an infant playard or travel crib.
What About Crib Sheets and Mattress Protectors?
OEKO-TEX STANDARD 100 is more commonly relevant to sheets and textile covers because it deals directly with substances in covered textile materials.
GREENGUARD Gold may appear on some larger or multi-material products, but it is not normally the first certification parents notice when shopping for a basic fitted sheet.
Certification is only one part of choosing bedding. A crib sheet or protector also needs to:
- Match the exact mattress size
- Fit smoothly and snugly
- Stay secured around the corners
- Avoid bunching or creating raised areas
- Follow the mattress and crib manufacturers’ instructions
- Avoid adding cushioning to an infant sleep surface
A waterproof claim tells you that a product is intended to resist liquid. It does not tell you how well it fits, what materials it contains, whether the claim applies after repeated washing, or whether the item is approved for your mattress.
Follow the care directions for the sheet, protector, removable cover, mattress, and sleep space. Do not assume that one set of washing or drying instructions works for all layers.
How to Verify an OEKO-TEX Claim
Use the organic-versus-non-toxic comparison to separate certified sourcing from broader marketing language.
Look for the complete label, not just the words “OEKO-TEX fabric.”
A useful STANDARD 100 claim should allow you to identify:
- The exact certification name
- The certificate or label number
- The certified product or material
- The product class
- The company holding the certificate
- The current validity of the certificate
OEKO-TEX provides a Label Check tool. Shoppers can scan the label’s QR code or enter the certificate number to check validity and view available certificate information. STANDARD 100 certificates are issued for a defined period and must be renewed to remain current.
Be cautious when a retailer shows an OEKO-TEX logo but does not provide a number or explain whether the claim applies to one fabric, several components, or the finished product.
How to Verify a GREENGUARD Gold Claim
Confirm that the label says GREENGUARD Gold, not only GREENGUARD Certified.
Then search for the exact product in UL’s SPOT database. Match details such as:
- Brand
- Product name
- Model or collection
- Product category
- Certification level
- Listed variations
- Current certification status
Do not assume that certification applies to every product sold by the same brand. One mattress collection may be certified while another is not. A retailer may also reuse broad marketing copy across several listings, which is why the official record matters. UL identifies SPOT as its database for checking certified products.
How to Choose Between Two Products
After verifying materials and certification scope, compare complete options in the non-toxic crib mattress roundup.
When one crib mattress has OEKO-TEX STANDARD 100 and another has GREENGUARD Gold, compare the full setup rather than choosing by logo alone.
Start with:
1. Correct fit and approval
The mattress must be intended for your exact type of sleep space. Check the crib, mini-crib, or toddler-bed instructions.
2. Infant firmness
A mattress used for an infant needs to meet the applicable firmness requirements. A certification about textile substances or emissions does not answer this question.
3. Certification scope
Determine whether the certification covers the whole mattress, the cover, the foam, or another component.
4. Cleanup design
Check whether the surface is waterproof, whether the cover is removable, and what the care instructions allow. Do not assume that “washable” means the entire mattress can be washed.
5. Current records
Verify the certificate or database listing. Old screenshots and copied retailer text may no longer reflect the current product.
6. Toddler use
For a dual-sided mattress, confirm which side is intended for infants and which is intended for toddlers. “Dual-sided” means the mattress has different intended sleep surfaces, often with a firmer infant side and a different toddler side.
Do not switch sides based only on a child seeming uncomfortable. Follow the mattress instructions and current guidance appropriate to the child’s age and development.
The Practical Bottom Line
OEKO-TEX STANDARD 100 and GREENGUARD Gold are not competing versions of the same test.
OEKO-TEX STANDARD 100 is mainly about specified substances in the certified textile, material, component, or finished article. GREENGUARD Gold is mainly about chemical emissions from the certified product into indoor air.
For a crib mattress, GREENGUARD Gold can be especially informative when it clearly applies to the finished mattress. STANDARD 100 can be especially informative when you want verification for fabrics, foams, covers, or a finished article covered by the certificate.
Having both may provide broader information, but neither certification replaces the basics: correct model compatibility, a firm and flat infant sleep surface, a tight fit, a snug fitted sheet, proper setup, current recall checks, and the manufacturer’s instructions.
Frequently Asked Questions
Is OEKO-TEX better than GREENGUARD Gold?
Not overall. OEKO-TEX STANDARD 100 evaluates specified substances in covered materials or articles, while GREENGUARD Gold evaluates chemical emissions into indoor air. The better fit depends on what you want verified and whether the certificate applies to a component or the finished product.
Is GREENGUARD Gold important for a crib mattress?
It can be useful because it provides third-party information about emissions from the certified product. It does not verify mattress fit, infant firmness, crib compatibility, waterproofing, durability, or every material claim.
Does OEKO-TEX mean a crib mattress is non-toxic?
OEKO-TEX STANDARD 100 means the certified article or material met the program’s limits for the substances included in its testing criteria. “Non-toxic” is a broad marketing term and should not be treated as a promise that a product contains no chemicals or presents no possible risk.
Does GREENGUARD Gold mean a mattress has no VOCs?
No. GREENGUARD Gold means the certified product met the program’s low-emissions limits. It does not mean that the product releases zero VOCs or contains no chemical substances.
Can a crib mattress have both certifications?
Yes. The certifications cover different areas, so a product may hold both. Check the official records to confirm that each certification applies to the exact mattress model and to understand the scope of the OEKO-TEX certificate.
Is OEKO-TEX Product Class I the best class for babies?
Product Class I is the STANDARD 100 class for products intended for babies and children up to 36 months. It has the program’s strictest limits. However, shoppers should still confirm what exact article or material the certificate covers.
Can I add a GREENGUARD Gold mattress to a playard?
Only when the playard manufacturer explicitly approves that exact mattress or replacement. Certification does not override the playard’s instructions, and an unapproved mattress can create problems with fit, height, or gaps.
Use the CertiPUR-US certification guide to see what flexible foam testing covers and what remains outside its scope.
The crib mattress allergen guide explains how dust, moisture, covers, and cleaning can matter more than a broad label.
Use the crib mattress off-gassing guide to separate a temporary odor from emissions claims and persistent problems.
Apply the non-toxic claim checklist before relying on vague words without named materials or certification scope.
