Frequently Asked Questions
General Questions
What sizes does this mattress come in?
This mattress is available in several sizes. Common equivalents for the UK market include: Single/Twin (approx. 90-97cm x 190cm or 3ft x 6ft 3in), Double/Full (approx. 135-137cm x 190cm or 4ft 6in x 6ft 3in), and UK King (150cm x 200cm or 5ft x 6ft 6in). Some listings may also offer sizes like US Queen (approx. 152cm x 203cm or 5ft x 6ft 8in). Please always check the size selection options on this page for precise dimensions (cm and inches) and current UK availability.
Does the mattress have a warranty?
Yes, this Zinus mattress typically comes with a 10-year limited warranty against manufacturing defects. We recommend checking the specific warranty terms provided with the product or on this page for full details.
What is the return policy or trial period?
Many mattresses, including Zinus, are offered with a home trial period (e.g., 100 nights). If you’re not satisfied, you can usually return it. Please check the seller’s return policy and trial period terms on this Amazon page for this specific product, as conditions can vary.
Installation Questions
How long does the mattress take to expand?
The mattress typically expands to its full size within 24‑72 hours, depending on room temperature.
Can I sleep on it before it fully expands?
Waiting allows the mattress to reach its intended comfort and height for the best experience.
Is there any odour when unboxing?
A slight “new product” smell may be present and will dissipate within a couple of days in a well-ventilated room. The green tea and charcoal infusions help to minimise this.
Maintenance & Care
How do I clean the mattress?
Spot‑clean with mild detergent and a damp cloth. Avoid saturating the foam layers. Using a mattress protector is recommended.
Can I flip or rotate the mattress?
This mattress is designed to be used on one side only, so it should not be flipped. You can rotate it head‑to‑toe every 3‑6 months to promote even wear.
Shipping & Delivery
How is the mattress shipped?
The mattress is compressed, rolled, and vacuum‑sealed, then shipped in a compact box directly to your door.
How long does shipping usually take?
Standard delivery typically ranges from 3‑7 business days, but can vary. You’ll receive a tracking number once it ships.
Zinus 20cm (8-inch) Green Tea™ Memory Foam Mattress
Fiberglass‑Free • CertiPUR‑US® • 10‑Year Warranty





Key Features
- Refreshing green tea & moisture‑absorbing charcoal infused into three layers of top‑notch foam for full‑body pressure relief.
- Patented Custom Contour Support—expertly stacks plush memory foam over super‑dense base foam so you never feel like you’re sinking.
- CertiPUR‑US® & Fiberglass‑Free—high‑quality, durable foams without the scary stuff.
- Effortless Unboxing—ships in one easy‑to‑move box; unbox, unroll, and watch it expand to full size in ≤72 h.
- Please allow 24–72 h for full expansion; warmer rooms speed the process.
- Worry‑free 10‑year warranty & up to 227 kg (approx. 500 lb) weight limit (Queen size and larger).
How It’s Made
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Ingredient Prep
US-sourced foams infused with natural green tea & charcoal.
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Precision Pour
Small-batch pours guarantee perfectly even density.
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CNC Cutting
24 h cure, then laser-guided blades sculpt every layer.
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Vacuum Roll-Pack
Compressed & rolled to one-quarter its size for easier shipping.
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Quality Check
Each unit CertiPUR-tested before it leaves the dock.
Customer Reviews
“I’ve had the 30cm (12-inch) Green Tea for 8 years—still no dips, no sagging, zero back pain.”
Orbenth – Oct 29 2023
“Unboxed in minutes, minimal odor, and the pressure-relief is insane for the price.”
bhtailor – May 13 2025
“Switched from a £1500 name-brand—this Zinus beats it for comfort and my back finally stopped hurting.”
Michael – Nov 28 2022
“Lightweight box showed up fast—expanded to full height in under 24 h and feels like sleeping on a cloud.”
Lisa – May 27 2024
“Really good for the price. A bit firmer than I expected for a ‘plush’ top, but supportive. Took 2 days to fully expand.”
David K. – Jan 15 2023
“Perfect for our guest room. Everyone who has slept on it says it’s super comfortable. No complaints at all!”
Sarah P. – Apr 02 2025
“Bought this for my son’s university flat. He says it’s the best sleep he’s gotten in ages. Easy to set up too.”
Emily R. – Aug 19 2023
“After weeks of research, I landed on this one and I’m so glad. It’s supportive for my back but still has a nice soft top layer.”
Jessica B. – Mar 10 2025