Most memory foam mattresses have a smell. It's the unavoidable byproduct of the chemical foaming process — a mix of volatile organic compounds (VOCs) that can take weeks to off-gas. For decades, the industry's solution was to add synthetic fragrance to mask the odor. Zinus took a different approach entirely.
Green tea contains polyphenols — natural antioxidants with documented antimicrobial and odor-neutralizing properties. By infusing green tea extract directly into the foam during manufacturing, Zinus engineers found they could neutralize VOC odors at the molecular level, rather than simply masking them. No artificial fragrances. No chemical coverups.
The result is the signature Zinus "fresh from the box" experience: a mattress that expands fully within 24–72 hours and smells of nothing harsher than clean foam. It's a small detail that makes an outsized difference — and it has made the Green Tea Memory Foam mattress the best-selling mattress on Amazon for multiple consecutive years.
Beyond green tea, Zinus also incorporates activated charcoal (for moisture absorption), castor oil bio-foam (to reduce petroleum-based materials), and cooling gel micro-beads — each chosen as a functional, natural alternative to its synthetic counterpart.