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

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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

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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Opal 9" Innerspring | Mattress on Demand

Size

Total