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Diamond Rock Extra Firm 12" Mattress
Diamond

Diamond Rock Extra Firm 12" Mattress

3.0 (2 reviews)
Made in USACertiPUR-US
$799
$999
Save $200 · 20% off
In Stock — Ready to Ship
0% APR Financing Available
$67/month

$799.00 over 12 months at 0% APR. Learn more & apply →

Size
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Free DeliveryWhite glove setup
120-Night ExchangeRisk-free trial
Price MatchGuaranteed lowest
0% APR FinancingEasy monthly payments

What Makes This Mattress Different

Made in the USA
Designed and manufactured domestically, giving this mattress tighter production standards and faster delivery logistics than imported alternatives.
CertiPUR-US Certified Foam
All foam layers independently tested for durability, performance, and low VOC emissions. Free from harmful chemicals, heavy metals, and ozone-depleting substances.
Tri-Zone Support Design
Zone-specific coil construction reinforces support at the center third of the mattress where lumbar pressure concentrates, while keeping shoulder and leg zones more responsive. Noticeably better back support than a uniform-coil alternative.
Moisture-Wicking Sleep Surface
A breathable, moisture-wicking fabric cover draws heat and humidity away from the sleep surface, preventing the warm and damp feeling that builds with less breathable ticking alternatives.
Diamond Rock Extra Firm 12" Mattress displayed on a modern bed frame in a stylish bedroom setting.

Mattress Construction

Built layer by layer for lasting comfort

Performance Fabric CoverBreathable, moisture-wicking top cover for a fresh sleep surface
0.5"
Comfort Foam LayerPressure-relieving comfort foam cushions the shoulders, hips, and lower back
2"
Foam Transition LayerPrevents a jarring shift from soft comfort foam to firm coils. This layer keeps the feel consistent - you notice support building gradually, not a sudden change underfoot.
1.5"
Pocketed Coil SystemIndividually wrapped coils provide targeted, responsive support and minimize motion transfer
7"
High-Density FoundationDurable base layer stabilizes the coil system for long-term structural performance
1"
Total Height12"
Sleep Style

Who This Mattress Is Best For

Find out if this is the right match for your sleep style

Back Sleepers

Excellent Match

The medium feel keeps the spine in a neutral position without feeling rigid. Coils provide responsive lumbar support while the foam layers prevent pressure buildup at the lower back - a strong match for back sleepers who want support without a hard surface feel. Not ideal for strict stomach sleepers who need a firmer, flatter surface.

Combination Sleepers

Excellent Match

The pocketed coil system responds quickly when you shift positions, so moving from your back to your side doesn't require effort. The medium feel accommodates multiple positions without needing a dedicated firm or plush surface. Better fit than dense memory foam for sleepers who move frequently.

Couples

Excellent Match

Individually wrapped coils contain movement within a small area of the mattress. When one partner shifts, it doesn't travel to the other side. The medium feel works for most sleep styles, making it easier for couples with different preferences to share the same mattress without compromise.

5 Los Angeles Showrooms

Try It Before You Buy It

Come in and test this mattress at any of our five LA showrooms. Our sleep consultants will help you compare firmness levels and find your perfect match, no appointment needed.

Test comfort in person Compare firmness levels Expert sleep advice No-pressure environment
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Delivery & Services

Stress-free delivery from our team to your bedroom

Free White Glove Delivery

We deliver to your room and set up your new mattress, included on all LA orders.

Delivery details ?

120-Night Comfort Exchange

Sleep on it for up to 120 nights. If it's not the right fit, we'll help you exchange it.

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Old Mattress Removal

We haul away and responsibly recycle your old mattress when we deliver your new one.

Recycling info ?

Ready to Sleep Better?

Add to cart for delivery, or visit a showroom to try it in person. Our sleep experts are here to help.

Customer Reviews

2 verified reviews

3.0
2 reviews
V
Vitor Vilela · Los Angeles, CA
✓ Verified
June 7, 2025

Not satisfied - very bouncy

I used to own a diamond rock mattress, and bought this one thinking it would have the same quality as the previous model. I was very wrong. This new model is very bouncy and did not meet my expectations. The old model was so good, I never felt any movement from my wife sleeping by my side, this new model I feel everything. I’m very disappointed.

M
Mary · Studio City, CA
November 14, 2024

Quality Mattress

This product has a good price and a good quality is firm I am very satisfied with this product good deal

Frequently Asked Questions

Everything you need to know before you buy

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