Opal 9" Innerspring | Mattress on Demand

Mattresses

Opal 9" Innerspring Mattress – Classic Comfort & Reliable Support | Mattress on Demand

Experience timeless comfort and durable support with the Opal 9" Innerspring Mattress. Designed for those who prefer a traditional innerspring feel with added stability, this mattress features a stability foam layer for extra cushioning and enhanced durability. Built with a high-quality innerspring support system, this mattress offers optimal spinal alignment, breathability, and long-lasting performance. Proudly made in Texas by Diamond Mattress Manufacturing, a long-standing leader in premium sleep solutions, this mattress is crafted with precision and high-quality materials to ensure years of restful sleep.

Mattress height:

9 inches

Sleep type:

Back

Mattress type:

Spring

Comfort/Feel:

Medium

Size

Twin

$349.00

Twin XL

$399.00

Full

$425.00

Queen

$449.00

King

$599.00

Cal-King

$599.00

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Total

$349.00

In stock

Key Features:

✔ Stability Foam Layer – Provides extra cushioning, reduces pressure points, and enhances motion isolation.
✔ Traditional Innerspring Support – Features a durable coil system designed to offer consistent support and long-term durability.
✔ 9-Inch Profile – A sleek, supportive design that fits perfectly on platform beds, box springs, and adjustable bases.
✔ Breathable Construction – Encourages airflow, keeping the mattress cool and comfortable throughout the night.
✔ Reinforced Edge Support – Maximizes the usable sleep surface and prevents sagging over time.
✔ Made in Texas – Expertly crafted by Diamond Mattress Manufacturing, ensuring premium craftsmanship and reliability.
✔ Lightweight & Easy to Move – Perfect for guest rooms, dorms, or guest room use, making it an excellent budget-friendly option.

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.

10-Year Warranty

Made in Texas, USA

Expert Assistance Awaits

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Why Choose the Opal 9" Innerspring Mattress?

At Mattress on Demand, we offer high-quality, American-made mattresses designed for comfort, support, and long-lasting performance. The Opal 9" Innerspring Mattress is the perfect choice for sleepers who prefer a firmer, more traditional mattress feel, as well as those looking for an affordable yet reliable sleep solution. Whether it's for daily use, a guest room, or a child’s bed, this mattress provides consistent support and breathability for a restful sleep experience.

✅ Order Today with 0% Financing Available – Get your perfect sleep now, pay later!

Shop Now and enjoy the trusted comfort and durability of the Opal 9" Innerspring 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

Proven Excellence: Discover why 1,500+ Customers gave us Five Stars!

5.0

Bahiyah Pavlicek

We wanted to test out Helix mattresses after the reviews I read online, and this store is the only one that keeps them out on the floor on the west side of Houston. Saad did a great job of helping my husband and I narrow our choices down. He was very patient and answered all our questions on the differences and the manufacturing process. We ended up making the purchase since the store gave us additional items/discount.

Verified Buyer

Store:

Mattress on Demand Richmond, TX

5.0

Will McKeever

I went to about 4-5 different mattress stores and I was between the Helix and another brand. Saad was the deciding factor and treated my wife and I like true customers and not just a commission check. As someone in Sales, I will say he was the perfect mix of real/down to earth and salesperson. I respect his professionalism. Would recommend him all day long.

Verified Buyer

Store:

Mattress on Demand Katy, TX

5.0

Robert Miller

Mr Butt did a fantastic job in explaining the importance of getting the right mattress for my wife and me. We picked the Autopilot by diamond It should be delivered in 7 days and I am sure that it will exceed our expectations. Thanks again to saad for being a great person in selling us our forever mattress.

Verified Buyer

Store:

Mattress on Demand Richmond, TX

5.0

D.C. A.

We have been shopping for a new mattress for quite some time now with a budget. The places we visited were way out of our price range. I would like to say that this came to an amazing end! Mattress on Demand in Katy has given us a great experience in a quality mattress as well as for our wallet. I was very impressed with the knowledge that Tony has for quality sleep. I would definitely recommend the best mattress store in Katy, Mattress on Demand!

Verified Buyer

Store:

Mattress on Demand Katy, TX

5.0

Crystal Neavear

This was the best experience I have ever had when buying furniture. When I had a question Tony was fast in responding. My order was shipped super fast and the quality of the product is amazing. I will definitely be buying from mattresses on demand in the future. Worth every penny! Tony is helpful and understanding and a joy to speak with. He went above and beyond his customer service duty best place EVER!!!! Thank you so much Tony

Verified Buyer

Store:

Mattress on Demand Richmond, TX

5.0

Great to Work With

Larry at Mattress on Demand was great to work with. Very honest and showed us all options, regardless of budget. I honestly don’t know if there’s cheaper options and don’t care. This was our first stop and the service alone was enough to sell me. They even followed us home for delivery. Can’t beat that. Thanks for a great experience. Will definitely be back when the kids need a new mattress soon.

Great to Work With Verified Buyer

Store:

Mattress on Demand Katy, TX

5.0

Shari Cready

We recently purchased a new Helix hybrid mattress and adjustable base from Mattress on Demand in Katy, TX. We had a great experience with Saad assisting us in making our final selections after our extensive research. The experience was enjoyable with no pressure or hard sell tactics and we felt the price was fair. Once our purchase was complete, Mattress on Demand delivered and set-up our new bed and frame, showing us how to use the adjustable base and answered any of our questions. We would highly recommend them for your next mattress purchase.

Verified Buyer

Store:

Mattress on Demand Richmond, TX

5.0

Brittany Cantu

I recently had the pleasure of visiting a small business mattress shop owned by Tony, and it was a fantastic experience from start to finish. The shop boasts a diverse selection of mattress brands, catering to a variety of preferences and budgets. What truly set the experience apart, though, was Tony’s exceptional knowledge and dedication to his craft.

Tony took the time to understand my needs and preferences, providing insightful recommendations without any pressure. His expertise in different mattress types and brands made it easy for me to find the perfect match. Thanks to his guidance, I am now enjoying a mattress that has significantly improved my sleep quality.

If you're in the market for a new mattress and value personalized service, I highly recommend visiting Tony’s shop. His commitment to customer satisfaction and his thorough understanding of the products make it a standout choice.

Verified Buyer

Store:

Mattress on Demand Katy, TX

Proven Excellence: Discover why 1,500+ Customers gave us Five Stars!

Read all review

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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Subtotal:

Opal 9" Innerspring | Mattress on Demand

Size

Total

$349.00

Materials

Key Features:

Certifications

UL GREENGUARD Gold Certification

Warranty

Where it’s made

Expert Assistance Awaits

Why Choose the Opal 9" Innerspring Mattress?

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Proven Excellence: Discover why 1,500+ Customers gave us Five Stars!

Bahiyah Pavlicek

Store:

Will McKeever

Store:

Robert Miller

Store:

D.C. A.

Store:

Crystal Neavear

Store:

Great to Work With

Store:

Shari Cready

Store:

Brittany Cantu

Store:

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?

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