Siena 10” King Memory Foam Mattress - Medium Firm - 180 Night Trial - Premium Pressure-Relieving Layers - 10 Year Warranty - Mattress in a Box - CertiPUR-US Certified
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Availability:
In Stock.
Arrives
Saturday, Nov 8
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Size: King
Style: 10” Memory Foam
Pattern Name: Mattress
Features
- 100% Polyester Blend
- 180-NIGHT HOME TRIAL and 10 YEAR MANUFACTURER WARRANTY - Rest easy with a Siena mattress. You'll enjoy a 180-night home trial, and we stand by our product if theres any defect or flaw in your Siena in the first 10 years, we'll replace or repair it for free.
- FIVE LAYERS OF COMFORT - Siena doesnt compromise on comfort. We might cost a lot less than our competitors, but your Siena mattress sure packs a punch when it comes to responsive comfort, supporting proper spinal alignment, and relieving pressure points. With lots of motion-reducing foam, you wont be disturbed if your partner or pet moves.
- MEMORY FOAM - A 2 layer of pressure relieving memory foam adapts to your unique body shape and size, while contouring to your curves.
- MEDIUM FIRM AND SUPPORTIVE - Finding the perfect firmness is a breeze with Siena. It's medium-firm, striking the ideal balance between comfort and support for a restful night's sleep.
- SIMPLE TO SET UP - Just move the box to the room you want to use it in, unbox and unroll your mattress, and watch it expand before your eyes. Your Siena will be snooze-ready in 24 hours.
- SAFE & FIBERGLASS FREE - Your Siena mattress is made without ozone depletors, mercury, lead, formaldehyde, phthalates and other harmful substances that can be in consumer products
Description
We believe everyone should be sleeping on a truly comfortable mattress. A mattress that is designed to support your body in all the right places - so you fall asleep fast & wake up feeling refreshed! A great sleep shouldn’t cost the earth. You won’t see Siena advertised on TV - we put the highest quality materials into our mattresses so you can enjoy a great sleep at a great price.
Size: King
Special Feature: 180 Night Trial, Back Pain Relief, Breathable and Cool, Low Motion Transfer, Pressure Relief
Color: White
Upholstery Fabric Type: Polyester Blend
Product Dimensions: 80"L x 76"W x 10"H
Size: King
Special Feature: 180 Night Trial, Back Pain Relief, Breathable and Cool, Low Motion Transfer, Pressure Relief
Color: White
Upholstery Fabric Type: Polyester Blend
Product Dimensions: 80"L x 76"W x 10"H
Brand: Siena
Included Components: Mattress
Finish Type: Unfinished
Weight Limit: 800 Pounds
Item Weight: 85 Pounds
Age Range (Description): Adult
Product Care Instructions: Hand Wash Only
Assembly Required: No
Form Factor: Platform Bed
Warranty Type: Limited
Manufacturer: Siena Mattress
Assembly Instructions Description: No assembly required. Unbox, unroll, and let it expand.
UPC: 860007700217
Item Weight: 85 pounds
Item model number: sienamattress-sking
Thickness: 10 Inches
Fabric Type: 100% Polyester Blend
Refill: Gel Memory Foam, Memory Foam
Finish types: Unfinished
Warranty Description: 10 year manufacturer.
Batteries required: No
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Saturday, Nov 8
Yes, absolutely! You may return this product for a full refund within 100 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Size: King
Style: 12” Memory Foam
Pattern Name: Mattress
Replaced a $2000 mattress with this one and have been 100% satisfied. We purchased the 12 inch King mattress to replace a spring mattress we had invested a lot of money in. I have numerous ruptured discs in my back and problems with my SI joint, so it is difficult to find a bed that does not leave me sore in the morning and cause me to spend 45-50 minutes stretching in the morning. The description for this one has the same buzzwords you see on most mattresses about pressure relieving layers and etc. I can say that this is the first mattress I have had in years where I wake up in the morning with no pain. It quickly expanded to 11.5 inches, so did not quite make it to the 12 inches advertised, but I'm not sure that is critical because it is all about the feel. This is on the firm side of medium firm, but is very comfortable. You do not sink in, so side sleepers will find this to be very comfortable. It is cool compared to other foam mattresses we've had as well. I plan on buying a second one for our weekend home.
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Reviewed in the United States on August 17, 2025 by Russellferd
Size: Queen
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Pattern Name: Mattress
This was the pareto optimal mattress according to NapLab and has phenomenal value for price. I would recommend looking at their website for more insights. I got the 10 inch thickness queen size, and it is quite firm and sturdy, with some give. It is also not bouncy. I would say this is better for people who like firm mattresses like me; doesn't feel at all like memory foam. I am quite light, though. There was no smell upon immediate unwrapping and the mattress inflated within 20 hours! I also appreciate that the materials used for this are certified for safety and it contains no fiberglass. My queen size sheets fit very well, and my sleep has been good also for the past four days, although if I did upgrade I would want a mattress with springs in it.
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Reviewed in the United States on September 24, 2025 by kat
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I was pleasantly surprised by how easy this mattress was to set up, just open the box, unroll it, and let it expand. It’s the perfect balance of softness and support, making it really comfortable to sleep on. The quality feels great for the price, and it’s a fantastic option if you want a hassle-free mattress that arrives right at your door. I didn’t notice any smell and it fit great on our standard twin bed frame.
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Reviewed in the United States on August 13, 2025 by Melb1228
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Extremely comfortable mattress! The only problem I ran into is that the dimensions, the measurements were not provided and so it’s a little too big for the space I have in my RV for a king mattress.
Reviewed in the United States on October 5, 2025 by Laura Lively
Size: Full
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Pattern Name: Mattress
Mattress in a box. Who knew? We bought this for our downstairs office/TV room. We have a nice sized bath and a walk in closet, so by adding a bed, we officially gave ourselves an extra bedroom. With a separate entrance downstairs it is great for guests. They have a microwave, coffee pot, cafe table, and a beautiful view of the mountains. Want breakfast? Make it yourselves. We tried it out a few nights and were impressed at how well we slept on it. We actually have a couch that lets out into a queen bed that has some brand name mattress, but the one time we slept on it, in a wind storm, we said we would never do it again. It was horrible. We have a Sleep Number bed and if you took away the bells and whistles, I would say this mattress sleeps just as well. Go for it. UPDATE: we have slept on the mattress a few times and it was as nice as our Sleep Number. However, we discovered something fascinating. Hubby and I both have Apple watches. Since we upgraded in December, it suggests that hubby has sleep apnea- 10-25 breathing interruptions a night. Me, none. We recently had company for several nights and let them use our bedroom and we took the mattress in a box bedroom. NO SLEEP APNEA recorded. Was it a fluke? Nope. When company left and we moved back to the $5000 Sleep Number bed the sleep apena readings went back up. To assure ourselves, we have been switching out over the past 2 weeks. Whenever he sleeps on this mattress, his readings are normal. I am no doctor and he has not seen a doctor, and it is possible something else is causing false readings, but whatever it is, his sleep is normal on this $300 mattress and abnormal on the Sleep Number mattress, no matter what number he uses. We usually always keep SN on 100 becasue we like a firm mattress but he has experimented on all numbers. The new mattress is also firm, which we like. So, if your watch tells you have sleep apena, try a different mattress.
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Reviewed in the United States on July 25, 2025 by Patty
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Its holding up well for a 300lb human constant use. Very firm, and foam. So this is not for someone that likes a soft bed. Easy to assemble, be careful when cutting through the box so you don't cut into the mattress. Its vacuum sealed into a bag. There was no smell and no noise when you roll around on it. Allow 3 or 4 days for it to fully puff up
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Reviewed in the United States on September 12, 2025 by I.B.
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I read the reviews, love the fact that no toxic materials were used in the manufacturing of this mattress. It’s a challenge purchasing mattresses online, we are pleased with the quality and the firmness of this mattress, firm but comfortable.
Reviewed in the United States on September 4, 2025 by Blair Blair
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I recently was diagnosed with fibromyalgia after dealing with chronic pain for ~18 years. I've got a lot of things in addition to that causing me pain, and it only just occurred to me after my diagnosis that my ancient mattress probably wasn't doing me any favors. The mattress was very easy to set up, and I ended up waiting 4 hours for it to expand, and it was at 9" by the time I went to bed, and since then has expanded to the full 10". There was also no smell at all when I took it out of the packaging. I immediately noticed a difference after the first night, because I woke up the next morning with no new pain, the first time that has happened in a very long time. I've had this for less than a week but I still love it and it is helping me tremendously. I can't vouch for its longevity but if you need an affordable mattress and suffer from chronic pain, I absolutely recommend this one.
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