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Rock Innerspring Extra Firm by Diamond Mattress

Free Delivery Setup & Removal

Get next day professional white glove delivery, setup and old bed removal all for free.

Free 120 Night Trial

Zero hassle exchange. The best exchange policy you will never need to use.

Sale Price

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After you complete your purchase you will be contacted to schedule your desired date of delivery.

Product Origin Designed and made in the USA.
Product Features & Specifications
An extra firm innerspring mattress is a type of mattress that features a support core made of steel coils, which provide a sturdy and supportive surface for sleeping. The coils are typically arranged in a pattern that helps distribute weight evenly across the mattress, reducing pressure points and providing a comfortable and supportive sleep surface. The extra firm version of this type of mattress is designed to be especially firm and supportive, making it a good choice for people who prefer a very sturdy and stable sleep surface. It may also be a good choice for people with back pain or other health conditions that require a firmer sleep surface
  • Performance Moisture Wicking Fabric
  • Verti-Coil Spring System
  • Extra-Firm-Eco-Flex Support Foam
  • Tri-Zoned Foam Encasement Design
  • Traditional classic feel
  • Recommended for the back and stomach sleepers who enjoy a superior firmer feel.
  • Plus-size body approved
Available Sizes & Dimensions


38" x 75" x 12"

Twin XL

38" x 80" x 12"


54" x 75" x 12"


60" x 80" x 12"


76" x 80" x 12"

CA King

72" x 84" x 12"

Shipping Details Los Angeles Mattress Stores offers free White Glove Delivery service for customers within Los Angeles County. This service includes the indoor delivery and setup of your online or in-store purchase, as well as the removal and disposal of all packaging debris. Someone must be present to accept the delivery. If you are located in a surrounding county, you may be subject to an additional fee for this service. Additional services or arrangements may also be subject to added fees
Comfort Guarantee
120 Night Sleep Trail

All the foams in this mattress have environmental certifications that ensure they are safe and non-toxic. Our polyurethane foams (memory foam, transition foam, and poly support foam) are CertiPUR certified.

CertiPUR-US® approved foams are made without ozone depleters, PBDE flame retardants, mercury, lead and other heavy metals, formaldehyde, phthalates regulated by the Consumer Product Safety Commission. They are Low VOC (Volatile Organic Compound) emissions for indoor air quality (less than 0.5 parts per million).

Warranty 20 year warranty. Read More


A universal mattress. It is compatible with all types of base like slatted bed base, a box spring, traditional bed or an electrically adjustable bed.

Slatted Base

Platform Bed

Adjustable Bed

Box Spring

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