12th Feb 2026, 05:23 PM
Siena 12 inch California King Memory Foam Mattress - Medium Firm - 180 Night Trial - Premium Pressure-Relieving Layers - 10 Year Warranty - Mattress in a Box - CertiPUR-US Certified
Price may vary by location, shipping cost, and availability.
13% Off
$399.00
$459.00
Highest: $518.57
Average: $455.76
Lowest: $370.80
Price History Graph
Offer Price Prices
Lowest: -
Average: -
Highest: -
Price History Information
You can check the price history of Siena 12 inch California King Memory Foam Mattress - Medium Firm - 180 Night Trial - Premium Pressure-Relieving Layers - 10 Year Warranty - Mattress in a Box - CertiPUR-US Certified here. This product's current Price in USA is $399.00. The average and highest prices are $455.76 and $518.57 respectively.
| Lowest Ever Price | $370.80 |
|---|---|
| 6th Jan 2026 | |
| Average Price | $455.76 |
| Based on 383 days price tracking | |
| Highest Price | $518.57 |
| 16th Sep 2025 | |
Price History of All Variants of Siena 12 inch California King Memory Foam...
Current Price in USA
| Price | $399.00 |
|---|---|
| MRP | $459.00 |
| Savings | $60.00 |
| Discount | 13.07% |
Recent Price Drops on Siena 12 inch California King Memory Foam Mattress - Medium Firm - 180 Night Trial - Premium Pressure-Relieving Layers - 10 Year Warranty - Mattress in a Box - CertiPUR-US Certified
Price Drop 11th Feb 2026
$459.00 → $399.00
13.07% drop
Price Drop 19th Jan 2026
$459.00 → $409.00
10.89% drop
Price Drop 5th Jan 2026
$432.20 → $370.80
14.21% drop
Price Drop 27th Nov 2025
$459.00 → $390.00
15.03% drop
Price Drop 14th Oct 2025
$507.75 → $459.00
9.6% drop
Price Drop 24th Aug 2025
$511.19 → $389.00
23.9% drop
Price Drop 24th Jul 2025
$514.62 → $389.00
24.41% drop
Price Drop 28th Jun 2025
$459.00 → $389.00
15.25% drop
Price Drop 9th Jun 2025
$517.40 → $459.00
11.29% drop
Price Drop 20th May 2025
$483.07 → $398.00
17.61% drop
Price Drop 5th Apr 2025
$459.00 → $399.00
13.07% drop
Product Information
Details
| Product Name | Siena 12 inch California King Memory Foam Mattress - Medium Firm - 180 Night Trial - Premium Pressure-Relieving Layers - 10 Year Warranty - Mattress in a Box - CertiPUR-US Certified |
|---|---|
| Store Product Code | B0DZJ3X419 |
| Store Name | amazon.com |
| Brand | Siena |
| Rating | 9 / 10 |
| Category | Mattresses |
| Product Manufacturer | Siena Mattress |
| Model Number | snfmtwlvbz-s:calking |
| Color | White |
| Size | California King |
| Dimensions | 84"L x 72"W x 12"H |
Features
- 100% Polyester Blend
- 180-NIGHT HOME TRIAL & 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.
- 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
- CertiPUR-US CERTIFIED - Your Siena meets all CertiPUR-US rigorous standards for materials, emissions, product durability and performance. This is an assessment made by independent, accredited testing laboratories. It means your Siena is made without ozone depletors, mercury, lead, formaldehyde, phthalates and other harmful substances that can be in consumer products.
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Rating and Reviews
9 Based on 988 reviews
Siena 12 inch California King Memory Foam has 9 rating out of 10. This average rating is consist of 988 individual ratings. You can rate this product at product review page.
* Predictions is created on based of past prices and trends, it does not guarantee that it will happen. These are just prediction for theoretical information only.