Molecule Mattress

Molecule Reflex Firm Mattress

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Size: Cal King

Molecule Reflex Firm: Cooling & Firm Support

Transform your nightly rest into an exceptional sleep journey with the MOLECULE Reflex Firm Mattress, available at Mattress Overstock. Crafted for those who demand substantial support from their sleep surface, this 10-inch mattress blends innovative cooling technology with responsive materials to deliver next-level restorative sleep.


Key Molecule Reflex Firm Features

🧊 Instant Cool Cover

Experience immediate cooling comfort the moment you lie down. This cover, made with advanced cooling fibers, creates a refreshingly cool sleep surface, helping you unwind and fall asleep faster.

💪 LiftCOR™ Body Boost Technology

Engineered for enhanced spinal alignment, this proprietary layer uses highly resilient gel bands to provide hyper-targeted support beneath your core, lifting and aligning your body exactly where needed most.

💨 CoolVENT™ Airflow Technology

Sleep cool and comfortable with advanced, open-cell support foam ensuring exceptional ventilation. This technology provides significantly more airflow (claimed 4.5x greater) compared to traditional gel memory foam, keeping you uplifted and pressure-free.

🏗️ Responsive & Supportive Foam Layers

While prioritizing a firm feel, Molecule utilizes responsive foam layers (potentially including AirTEC™ as in other Reflex models) designed to adapt to your shape while preventing excessive sinkage, ensuring both support and comfort.


💬 Ideal For Which Sleepers?

The MOLECULE Reflex Firm Mattress is particularly well-suited for:

  • Back Sleepers: Provides the firm, consistent support needed for optimal spinal alignment.
  • Stomach Sleepers: Helps prevent hips from sinking too deeply, promoting better posture.
  • Those Preferring a Firm Feel: Ideal for individuals who like sleeping "on top" of their mattress rather than sinking in deeply.
  • Warm Sleepers: Benefits greatly from the Instant Cool Cover and CoolVENT™ airflow technology.
  • Support Seekers: LiftCOR™ technology offers enhanced core and lumbar support.

⚙️ Technical Specifications

  • Height: ~10"
  • Feel: Firm
  • Construction: All-Foam
  • Key Technologies: LiftCOR™ Body Boost, CoolVENT™ Airflow, Instant Cool Cover, Responsive Foam Layers
  • Cover: Instant Cool Fabric (Check if removable/washable)
  • Certifications: CertiPUR-US® Certified Foams (Likely, confirm standard)
  • Warranty: Limited Lifetime Warranty (Typical for Molecule - Confirm details)

🧺 Care Instructions

  1. Always use a breathable mattress protector to keep your Molecule mattress clean and protected.
  2. Rotate the mattress head-to-foot every 3-6 months to ensure even wear. Flipping is not necessary.
  3. Place on a supportive, rigid foundation or base. Ensure Queen/King sizes have proper center support. Compatible with most adjustable bases.
  4. Spot clean the mattress cover only using a mild detergent and water solution, dabbing gently. Avoid saturating the foam. Allow to air dry completely. Do not machine wash the cover unless explicitly stated by Molecule.
  5. Vacuum the mattress surface periodically.

🏆 Your Kentucky Mattress Overstock Advantage

  • Find Molecule Sleep Tech Locally: Explore innovative firm mattresses like the Reflex Firm at our Kentucky showrooms.
  • Expert Guidance on Firm Mattresses: Our knowledgeable team can help you determine if the Reflex Firm meets your support needs. Meet our sleep experts.
  • Try Before You Buy: Experience the feel of Molecule technology in person at our locations in Lexington, Somerset, and Georgetown.
  • Fast Local Delivery Available: Get your new Molecule mattress delivered quickly across Central Kentucky – often as soon as tomorrow!
  • Visit Your Nearest Showroom: Get directions and hours.

🛒 Get Your Molecule Reflex Firm Today

Ready to experience unrivaled sleep quality with cooling, firm support? Upgrade to the MOLECULE Reflex Firm Mattress and discover the rejuvenating power of a truly supportive sleep environment, often backed by a lifetime warranty!

Explore the Molecule Collection! | See all Foam Mattresses!

Order now and make restful nights a reality! Need assistance?

  • Call our expert team: 859-710-9265
  • Use our website's live chat feature during business hours.
  • Visit one of our convenient Kentucky showrooms (Lexington, Somerset, Georgetown) for personalized advice.

🌙💤 Invest in transformative sleep with Molecule at Mattress Overstock!

Size: Cal King

What makes this mattress different

LiftCOR Body Boost Technology

Engineered for enhanced spinal alignment this proprietary layer uses highly resilient gel bands to provide hyper-targeted support beneath your core lifting and aligning your body exactly where needed

CoolVENT Airflow Technology

Sleep cool and comfortable with advanced open-cell support foam ensuring exceptional ventilation. This technology provides significantly more airflow (claimed 4.

Responsive & Supportive Foam Layers

While prioritizing a firm feel Molecule utilizes responsive foam layers (potentially including AirTEC as in other Reflex models) designed to adapt to your shape while preventing excessive sinkage

Molecule builds airflow and recovery-focused support into the foam itself
The foam

Molecule builds airflow and recovery-focused support into the foam itself

Molecule leans into open-cell foams, airflow channels, and zoning instead of a traditional spring unit. The result is a bed that stays quicker and more breathable than older-school dense memory foam.

The Core model is the simpler value play. The Reflex models add more targeted support, more cooling emphasis, and more specialized feel options depending on how much firmness and lift you want.

Compared with the Molecule Reflex Boost Medium, the Molecule Reflex Firm is tuned a little differently than the Molecule Reflex Boost Medium. That is the practical difference you feel in the showroom: the firm surface changes how deeply you settle in, while the underlying support build changes how easy it is to move and how steady the edge feels.

Shop all Molecule mattresses →
Who sleeps best on this mattress

Built for the way you actually sleep

Back sleepers - The flatter, sturdier surface keeps the midsection from dipping too far, which is usually the reason shoppers move into the firm version.

Stomach sleepers - This is the safer choice if you need more pushback through the pelvis and lower back than a medium model usually gives.

Hot sleepers - Cooling details in the cover and upper layers help, but if temperature is your top issue, the hybrid or step-up cooling model is usually the smarter comparison.

Shoppers cross-shopping the lineup - If the Molecule Reflex Firm feels either too flat or too plush in person, the closest adjustment is usually the Molecule Reflex Boost Medium.

Specifications

Height10"
FeelFirm
Firmness8 out of 10 (10 = firmest)
ConstructionInstant-cool cover + LiftCOR support bands + responsive comfort foams + high-density support core
CoolingExperience immediate cooling comfort the moment you lie down.
Motion isolationExcellent - layered foams absorb movement before it reaches the other side of the bed
Weight capacity
Adjustable baseYes, compatible with adjustable bases
CertificationsCertiPUR-US certified foams
WarrantyLifetime limited warranty
Trial period[121] days at Mattress Overstock

Frequently asked questions

How firm is the Molecule Reflex Firm?

We rate it 8 out of 10 (10 = firmest). In practical terms, that puts it in the firm part of the lineup. The right fit depends on your sleeping position, body type, and whether you like to sleep more on top of the mattress or more in it.

How is the Molecule Reflex Firm different from the Molecule Reflex Boost Medium?

The Molecule Reflex Firm and the Molecule Reflex Boost Medium are close enough in the lineup that most shoppers should compare them side by side. The biggest difference is feel: the Molecule Reflex Firm lands on the firm side of the lineup, while the Molecule Reflex Boost Medium feels more cushion firm.

Does it work with an adjustable base?

Yes, compatible with adjustable bases.

How fast can I get it delivered in Kentucky?

We deliver with our own team across Kentucky. Most orders arrive the next business day when the size is in stock. Pickup is available at our Lexington, Georgetown, Somerset, London, and Richmond locations.

What if I do not like it after a few nights?

You have 121 days to make sure the comfort is right. We usually recommend giving any new mattress at least 21 nights before making a comfort decision, because covers and foams need time to settle and your body needs time to adjust.

Can I try it before I buy?

Yes. We have these models represented across our Kentucky showrooms, so you can lie down on the feel before you buy. Walk in, take your time, and compare it against the nearby step-up and step-down models.

Still deciding?

Try it in person at any Kentucky showroom

Walk into any Mattress Overstock location, lie down, and feel the difference yourself. No appointment, no pressure. Our team has over 100 years of combined mattress experience and we're here to help you find the right fit.