The Certifications
OEKO-TEX Standard 100: Tests the finished product for a list of harmful substances including formaldehyde, pesticides, heavy metals, and allergens. Most widely used. However, it only requires that the finished product be below threshold levels — it doesn't guarantee the manufacturing process is sustainable.
GOTS (Global Organic Textile Standard): Certifies the entire supply chain for organic textiles — from harvest of raw materials through environmentally and socially responsible manufacturing. GOTS-certified mattresses use organic cotton/wool and non-toxic fire barriers. Most rigorous of the mainstream certifications.
GOLS (Global Organic Latex Standard): Specific to latex — certifies that latex comes from organic rubber plantations and that processing uses no toxic chemicals. If you're buying a latex mattress, GOLS is the minimum acceptable certification.
What Actually Matters for Off-Gassing
The primary sources of off-gassing in conventional mattresses: polyurethane foam (petroleum-based, emits VOCs), chemical fire barriers (treated with flame retardants that emit VOCs), and adhesives. OEKO-TEX and GOTS certifications directly address these — they require low-VOC foams, natural fire barriers (wool, silica), and no-harmful-adhesives.
Our Recommendation
For VOC-sensitive individuals (asthma, MCS, young children): buy a mattress with GOTS certification plus OEKO-TEX. The Avocado Green Mattress (GOTS + OEKO-TEX) and PlushBeds Botanical Bliss (GOLS + OEKO-TEX) are the best-documented options in this category.