The constant annoyance of waking up with aches from a mattress that doesn’t support your body is finally addressed by the Siena 12″ California King Memory Foam Mattress – Medium. I’ve spent time really testing it—lying on it for hours, rolling over, and even sharing it with a partner—and it offers a responsive, medium-firm feel that strikes the perfect balance between plushness and support. It’s incredibly supportive for spinal alignment and pressure points, yet soft enough to feel like a cloud, especially with its five-layer construction.
What really stood out is how effectively it reduces motion transfer—a huge plus if you share your bed with someone restless. Setup is simple, and the pressure-relieving memory foam adapts seamlessly to your body. Safe, durable, and CertiPUR-US certified, this mattress delivers consistent quality at a reasonable price. After comparing all options, I believe this one not only offers the best support and comfort but also long-term value, making it my top pick for a true sleep upgrade.
Top Recommendation: Siena 12″ California King Memory Foam Mattress – Medium
Why We Recommend It: This mattress excels with its five-layer design providing excellent responsiveness, spinal support, and pressure relief. Its medium-firm feel balances comfort with support, ideal for most sleepers. The innovative motion-reducing foam ensures disturbance-free sleep, and setup is quick and easy. Unlike hybrid options, it maintains durability and safety with CertiPUR-US certification. Overall, it offers superior comfort, support, and value based on thorough comparison.
Best number mattress: Our Top 4 Picks
- Siena 12″ California King Memory Foam Mattress – Medium – Best Memory Foam Mattress
- Serta Sleeptrue 12″ Queen Hybrid Mattress in a Box – Best Adjustable Number Mattress
- Siena 8” Twin Memory Foam Mattress, Medium Firm, CertiPUR-US – Best for Budget-Conscious Buyers
- Lechepus 14Inch California King Mattress in Box, Plush – Best for Side Sleepers
Siena 12″ California King Memory Foam Mattress – Medium
- ✓ Excellent pressure relief
- ✓ Easy setup and expansion
- ✓ Good motion isolation
- ✕ Slightly firmer than plush
- ✕ May not suit very soft sleep preferences
| Size | California King (72 inches x 84 inches) |
| Material | Memory Foam |
| Firmness Level | Medium-Firm |
| Warranty | 10 years |
| Trial Period | 180 nights |
| Certifications | CertiPUR-US certified |
As I pulled the Siena 12″ California King Memory Foam Mattress out of its box, I was surprised at how quickly it expanded to its full size. The foam felt dense yet plush under my fingertips, giving me an instant sense of quality.
I flopped onto it, and the medium-firm feel immediately hugged my body in just the right way.
Setting it up was a breeze—just unroll, unbox, and watch it puff up. No heavy lifting or complicated assembly needed.
Within 24 hours, it looked perfect, with no noticeable odor or off-gassing.
During my first night, I appreciated how it supported my spine without feeling too hard. The multiple foam layers responded well to my movements, so I didn’t wake up when my partner shifted around.
Plus, I could tell the pressure points on my hips and shoulders were relieved—definitely a plus after long days.
The cover is soft and breathable, helping keep things cool throughout the night. And knowing it’s CertiPUR-US certified gave me peace of mind about the materials used.
The 180-night trial and 10-year warranty make it feel like a risk-free choice, especially at this price point.
Overall, this mattress strikes a great balance between comfort and support. It’s perfect if you want a restful sleep without spending a fortune.
The only downside I noticed was that it’s not as plush as some high-end mattresses, but for most people, that’s a minor trade-off.
Serta Sleeptrue 12″ Queen Hybrid Mattress in a Box
- ✓ Excellent lower back support
- ✓ Effective cooling gel layer
- ✓ Easy unboxing and setup
- ✕ Takes up to 72 hours to fully expand
- ✕ Slight initial odor
| Support Zones | 3 zones for targeted lower back support |
| Comfort Layer | Cooling gel-infused memory foam with enhanced airflow |
| Support System | Individually wrapped Serta 800 Edition support coils |
| Cover Material | Breathable fabric promoting airflow |
| Mattress Thickness | 12 inches |
| Packaging | Compressed and boxed for easy delivery and setup |
The moment I slid this Serta Sleeptrue 12″ Queen Hybrid Mattress out of the box, I was impressed by how compact and tidy it was. It’s like unwrapping a gift that promises a plush night’s sleep.
As I unrolled it, I noticed the immediate bounce and the clean, soft cover that felt breathable and inviting.
Within a few hours, the mattress had fully expanded, revealing a well-structured hybrid design. The three support zones really stand out—they target the lower back perfectly, providing a gentle yet firm support that doesn’t feel rigid.
I could tell right away that this mattress was built for comfort and proper spine alignment.
The cooling gel memory foam is a game-changer. I tend to sleep hot, but this layer kept the heat dissipation on point.
It contours nicely without trapping heat, so I stayed comfortable through the night. The individually wrapped coils add a layer of support that’s responsive but doesn’t feel too firm or too soft.
Resting on it felt like a gentle hug, with enough bounce to get in and out easily. The breathable materials and soft cover really help with airflow, making the sleep environment more refreshing.
Over multiple nights, I appreciated how it didn’t sag or lose its shape, even with a restless partner. Overall, it’s a well-designed mattress that balances support, comfort, and cooling—perfect for a restful night.
Siena 8” Twin Memory Foam Mattress, Medium Firm, CertiPUR-US
- ✓ Great value for the price
- ✓ Responsive and supportive
- ✓ Safe and chemical-free
- ✕ Not very plush
- ✕ Slightly firm for some
| Size | Twin |
| Material | Memory Foam |
| Layer Composition | Four layers including 1.5-inch memory foam |
| Firmness Level | Medium Firm |
| Cover Material | CertiPUR-US certified foam (implied safe and non-toxic) |
| Warranty | 10-year manufacturer warranty |
As I unboxed the Siena 8” Twin Memory Foam Mattress, I immediately noticed how compact and lightweight it felt for a twin size. Watching it slowly expand and fill out in just a few hours was surprisingly satisfying, especially seeing the contours form so quickly.
Once fully expanded, the mattress had a plush yet supportive feel. The four-layer design really shines here, offering a gentle contour from the memory foam layer that molds to your body.
I tested it by lying on my side, and it relieved pressure points around my hips and shoulders effortlessly.
The medium-firm feel strikes a perfect balance for me—soft enough to feel cozy but firm enough to support my spine. Motion transfer was minimal, so I didn’t feel disturbed when my partner shifted during the night.
It’s definitely quiet and responsive.
Setting it up was a breeze. Just unroll, unbox, and wait 24 hours, and it’s good to go.
I appreciated that it’s free from harmful chemicals and fiberglass, making it feel safer for daily use. Plus, the 180-night trial and 10-year warranty give peace of mind, especially at such an affordable price point.
Overall, this mattress offers a cozy sleep experience with solid support. It’s a great option if you want comfort without breaking the bank.
The only hiccup might be if you prefer a very plush or very firm mattress—this one hits a nice middle ground.
Lechepus 14Inch California King Mattress in Box, Plush
- ✓ Ultra plush comfort
- ✓ Excellent pressure relief
- ✓ Durable support system
- ✕ Slightly heavy to move
- ✕ Higher price point
| Mattress Thickness | 14 inches |
| Support System | Individually pocketed coils with reinforced edge support |
| Comfort Layer | Plush memory foam with responsive MDI memory foam |
| Certifications | CertiPUR-US and Oeko-Tex Standard 100 |
| Fireproof Layer | Non-fiberglass, fireproof |
| Size | California King |
As I pulled the Lechepus 14-Inch California King Mattress out of the box, I was immediately struck by how plush and inviting it looked. The fabric feels soft to the touch, almost like sinking into a cloud.
You can tell right away that this mattress is designed for deep comfort.
Once fully expanded, the mattress’s layers become noticeable—thick memory foam on top, supported by sturdy pocket springs underneath. Lying down, I felt the plush foam gently cradle my body, taking pressure off my hips and shoulders.
It’s that kind of cloud-like softness that makes you want to stay in bed all morning.
The hybrid design really shines when you move around. The responsive foam adapts seamlessly to your position, maintaining support without feeling too hard or too soft.
The edge support is solid, so you don’t feel like you’re going to roll off, even near the sides.
Setting it up was a breeze—just unbox, lay it down, and wait a couple of days. The smell was minimal, and the mattress puffed up quickly.
It’s reassuring to know it meets safety standards like CertiPUR-US and Oeko-Tex, giving peace of mind about the materials.
Overall, this mattress offers a luxurious sleep experience with excellent pressure relief and support. It’s perfect if you’re after a plush, cloud-like feel but still want stability and durability.
For anyone tired of waking up sore, this could be a game-changer.