Zinus Green Tea vs Siena Memory Foam: Which cheap mattress should you buy?

If you’re looking for an excellent memory foam mattress but are working with a tight budget, then the Zinus Green Tea and Siena Memory Foam mattress are two top contenders. Both mattresses promise quality sleep without breaking the bank, but which one is right for you?

The Siena Memory Foam mattress appears in our guide to the best mattress of 2025, thanks to its firm support and sheer value for money. But there's plenty to recommend the Zinus Green Tea memory foam mattress too, with its green tea-infused memory foam layers and exceptional pressure relief for side sleepers.

In this Zinus Green Tea vs Siena Memory Foam mattress comparison piece, we put these two budget-friendly memory foam mattresses head to head to find out which comes out on top in terms of price, design, comfort and temperature regulation.

Zinus Green Tea vs Siena Memory Foam mattress: Price & trial

• Both of these beds are budget-friendly
• The Siena has a 180-night sleep trial while the Zinus offers 100-nights
• Both mattresses come with a 10-year warranty

Buying a new mattress is an important investment, but it doesn't have to break the bank. Thanks to evergreen mattress sales and hugely competitive MSRPs, you’ll get both the Zinus Green Tea and Siena Memory Foam mattress at ultra low prices — which is why you'll find both beds in our best cheap mattress guide.

You can buy a Zinus Green Tea for $499 (was $599), thanks to an evergreen sale. While that's excellent value all year round, we do occasionally see prices drop further during major holidays on third party retailer sites like Amazon and Walmart.

While the Siena Memory Foam does have a higher starting MSRP (which is described by the brand as 'total value'), a stronger evergreen Siena Mattress sale of up to 50% brings the sale price to less than Zinus. After discounts, a the cost of a queen is knocked down to just $399 (from a total value of $769.)

When it comes to sleep trials, the Siena Memory Foam offers 180 nights where as you get just 100 nights with the Zinus Green Tea. Meanwhile, both mattresses have a 10-year warranty and free shipping.

Zinus Green Tea Memory Foam mattress: was from $399 now from $249 at Zinus
The Zinus Green Tea Memory Foam mattress is incredible value at MSRP, but thanks to the brand's evergreen sale it’s always going to be even cheaper. A queen is $499 from $599, which is incredible value for money. You can sometimes find this mattress for less on third party websites like Walmart and Amazon but do check that you still get the same benefits.

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Siena Memory Foam Mattress: was from $529 now from $199 at Siena
The Siena tops our best cheap mattress guide because it doesn’t compromise on quality. An evergreen sale sees up to 50% off this already budget bed bringing the cost of a queen down to just $399 (was $769). It also comes with a 180-night sleep trial and 10 -year warranty.

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Zinus Green Tea vs Siena Memory Foam mattress: Materials & design

• Both mattresses have a 10” profile
• The Siena Memory Foam has two internal foam layers
• The Zinus Green Tea has three internal foam layers

Both of these mattresses have simple designs, but that doesn’t mean that they aren’t comfortable and supportive. The Zinus Green Tea mattress has a 10” profile and is made using three internal layers of foam. It starts with a soft, breathable cover followed by a green tea-infused memory foam layer. Next up, another green tea infused transition layer before a final base layer that is durable and offers solid support.

The Siena is also 10” tall and has just two internal layers, topped by a soft and breathable cover. The first foam layer is 1.75” of gel memory foam and beneath that is a 8.25” foundational foam layer which are both encased within a shift-resistant bottom cover to keep everything in place. Its a simple yet effective design, cementing it as one of the best memory foam mattresses on the market today.

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Zinus Green Tea vs Siena Memory Foam mattress: Comfort & support

• We rate the Siena Memory Foam as 9/10 for firmness
• We rate the Zinus Green Tea as 5.5/10 for firmness
• The Zinus is good for side sleepers, whilst the Siena suits back and stomach sleepers

Comfort and support are where these two mattresses start to really diverge from one another. The Zinus Green Tea has a medium tension, and during our Zinus Green Tea Memory Foam mattress review our testing panel gave it a firmness rating of 5.5/10. You'll find plenty of sink-in softness with this mattress, which is why we rate it as one of the best mattresses for side sleepers.

Average and light weight people who sleep on their side will appreciate how the traditional memory foam contours to the body, offering exceptional pressure relief across the shoulders, hips and knees. Heavier sleepers and stomach sleepers will likely find this mattress too soft, and lacking in the support they need.

In contrast, the Siena has a completely different sleep feel. Despite having an official medium-firm rating, the testing panel for our Siena Memory Foam mattress review agreed it was more like a 9 out of 10, making it a great option for those who primarily sleep on their stomachs or backs. We recommend the Siena as one of the best firm mattresses, thanks to its firm tension and value for money.

Since these beds are both made using memory foam (which isolates movement very well), they both scored highly when it comes to motion isolation, making them both a good option for anyone who shares a bed. However, the Zinus Green Tea has weak edge support, so opt for the Siena instead (which boasts excellent edge support) if a sturdy edge is important to you.

Zinus Green Tea vs Siena Memory Foam mattress: Temperature regulation

• Neither bed is a dedicated cooling mattress
• Siena has a breathable cover
• The Zinus uses green tea-infused foam for temperature regulation

Neither of these mattresses is a dedicated cooling bed, so if you are a hot sleeper, you may be better off opting for one of the best cooling mattresses instead.

The Siena has a breathable cover and gel infused into its top foam layer, and we were really impressed with how it kept our testers cool, especially for an all-foam bed. The firmer feel also means you don’t sink in to the bed, which means better air flow around the body.

In comparison, the Zinus has more of a traditional sink-in hug feel, which can feel warmer when sleeping. The Zinus uses green tea within its layers, which is designed to regulate temperature as opposed to provide additional cooling. However, though our lead tester didn't wake up due to overheating while trialling the Zinus, she did note that by the morning the bed felt somewhat stuffy.

Zinus Green Tea vs Siena Memory Foam mattress: Which should you buy?

Buy the Zinus Green Tea if…

✅ You like the 'hug' of memory foam mattress: Despite being a medium-firm mattress, this bed has more of a traditional memory foam feel, meaning you'll sink in to the layers and receive a contouring hug.

✅ You’re a side sleeper: This mattress offers great pressure relief and cushioning around the shoulders and hips.

✅ You're looking for a comfortable guest bed: Thanks to the affordable price and body-hugging comfort, this mattress is ideal for guest bedrooms.

Buy the Siena Memory Foam if…

✅ You’re a back or stomach sleeper: During testing, our team found this mattress to have a firmer feel than advertised, which makes it ideal for back and stomach sleepers who need strong support.

✅ You have a smaller budget: Thanks to a low MSRP and an incredible evergreen sale of up to 50% off, this mattress is exceptional value all year-round.

✅ You like to sleep near the edge of the bed: The sturdy edge support on this mattress will mean you can sleep close to the edge and not feel the bed dip or collapse beneath you, and those with mobility issues will be able to safely sit on the edge of the bed before standing.