Rock Express Firm 12inch Mattress

Mattresses

Rock Express Firm 12" Mattress – Cooling Comfort & Firm Support | Mattress on Demand

Experience superior firm support and cooling comfort with the Rock Express Firm 12" Mattress. Designed for those who need extra support without sacrificing pressure relief, this hybrid mattress features a copper-infused memory foam layer that helps regulate temperature and provides antimicrobial benefits. Built with high-density foams and individually wrapped coils, this mattress ensures durability, motion isolation, and proper spinal alignment. Proudly made in Texas by Diamond Mattress Manufacturing, a long-standing leader in premium sleep solutions, this mattress is backed by a commitment to quality and craftsmanship.

Mattress height:

12 inches

Sleep type:

Back

Mattress type:

Hybrid

Comfort/Feel:

Firm

Size

Twin

$1,200.00

$600.00

Full

$1,400.00

$750.00

Queen

$1,700.00

$850.00

King

$1,900.00

$950.00

Cal King

$1,900.00

$950.00

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Total

$600.00 $1,200.00

In stock

Performance Moisture Wicking Fabric

Certipur Extra-Firm HD Comfort Layers

Diamond-made Dynamic Edge Wrapped Coils

20-Year Warranty

Firmness level 9 out of 10

Made in America Mattress

Free Nationwide Shipping Bed-in-Box

UL GREENGUARD Gold Certification

The UL GREENGUARD Gold Certification Standard includes health-based criteria for additional chemicals and requires lower total VOC emissions levels to ensure that products are acceptable for use in environments such as schools and healthcare facilities. In addition to limiting emissions of more than 360 VOCs and total chemical emissions, UL GREENGUARD Gold Certified products must also comply with the requirements of the California Department of Public Health (CDPH) Standard Method for the Testing and Evaluation of Volatile Organic Chemical Emissions from Indoor Sources Using Environmental Chambers, also known as California Section 01350.

All certified products are subject to a review of the manufacturing process and routine testing to demonstrate minimal impact on the indoor environment in the long period.

20-Year Limited Warranty

Made in Texas, USA

Expert Assistance Awaits

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Why Choose the Rock Express Firm 12" Mattress?

At Mattress on Demand, we provide high-quality, American-made mattresses at unbeatable prices, ensuring you get the best firm sleep experience possible. The Rock Express Firm 12" Mattress is designed for back and stomach sleepers who need strong support for proper spinal alignment while benefiting from cooling technology and motion isolation.

✅ Order Today with 0% Financing Available – Get the firm support you need now, pay later!

Shop Now and experience the perfect blend of firm hybrid support and cooling comfort with the Rock Express Firm 12" Mattress – exclusively at Mattress on Demand!

Firmness Scale

1-3

Plush

3-4

Medium-Plush

4-6

Medium

6-8

Medium-Firm

8-9

Firm

9-10

Extra-firm

Frequently Asked Questions

At Mattress on Demand, we understand that finding the right mattress is crucial for a good night's sleep. That why we encourage all our customers to continue to break in their mattress for up to 45-60 days to get the resulted comfort feel and adjusted to your body.

At Mattress on Demand, we always want to provide you with the best experience when it comes to shipping. Our shipping partners, primarily FedEx, will do the best effort to get your mattress to you in 3-5 business days after manufacturing. Did we mention that shipping is FREE?!

At Mattress on Demand, the type of credit inquiry depends on the finance option you choose. Synchrony performs a hard credit check, which might slightly affect your score, typically by no more than five points. However, multiple hard inquiries over a short period can have a greater impact. Meanwhile, Affirm and Snap Finance conduct soft checks, which don't affect your credit score. Remember, a single hard inquiry usually has a minor, short-term effect, but it's best to avoid several hard inquiries in a brief span to maintain your credit health.

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Bed Size

Brands

Feel

Types of Mattress

BedTech Adjustable Bases

TEMPUR Adjustable Bases

Bedding

Pillows

CARBONCOOL® + OMNIPHASE® LT Pillow

Bed Tech Comfort Rest Pillow

Foundations

Platform frame

Bed rails

Rock Express Firm 12inch Mattress

Size

Total

$600.00 $1,200.00

UL GREENGUARD Gold Certification

Expert Assistance Awaits

Why Choose the Rock Express Firm 12" Mattress?

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Product

Support

About

Follow us

Bed Size

Brands

Feel

Types of Mattress

Find the best mattress for your needs with our quick mattress finder quiz.

BedTech Adjustable Bases

TEMPUR Adjustable Bases

Bedding

Pillows

CARBONCOOL® + OMNIPHASE® LT Pillow

Bed Tech Comfort Rest Pillow

Foundations

Platform frame

Bed rails

Cart

Subtotal:

Rock Express Firm 12inch Mattress

Size

Total

$600.00 $1,200.00

Materials

Certifications

UL GREENGUARD Gold Certification

Warranty

Where it’s made

Expert Assistance Awaits

Why Choose the Rock Express Firm 12" Mattress?

You may also like...

Citrine 8" Foam | Mattress on Demand

Dusk 12" Hybrid | Mattress on Demand

Arcadia 13" Tight-top Hybrid | Mattress on Demand

Frequently Asked Questions

What should I do if my new mattress feels uncomfortable?

How do you get my mattress to me if I live in another state?

What's the credit check process for Mattress on Demand's finance options?

All Things Sleep

The Comprehensive Guide to Getting the Cheapest Mattress in Katy, Texas

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About

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