Graphene Cool Hybrid Mattress in bedroom setting on a white wood frame, highlighting the tall 14.5 inch quilted profile. Graphene Cool Hybrid Mattress diagram showcasing cooling memory foam layers and a patented zoned nested coil system. Close-up of the Graphene Cool Hybrid Mattress showing the premium quilted texture and durable moisture-wicking fabric. Front view of the 14.5 inch Graphene Cool Hybrid Mattress featuring a luxury Euro Top and charcoal grey side panels. Angled view of the Graphene Cool Hybrid Mattress highlighting the 14.5 inch Euro Top and luxury quilted fabric top.
Graphene Cool 14.5" Euro Top Quilted Hybrid Mattress by Diamond Mattress
Ultra Soft Soft Medium Soft Medium Medium Firm Firm Extra Firm

Graphene Cool 14.5" Euro Top Quilted Hybrid Mattress by Diamond Mattress

$1,599.99
$1,849.99
Save $250.00
Brand: Diamond
Size
Comfort Level
Best for Stomach sleepers
i Size Guide
$1,599.99
Only 20 left in stock
Free Shipping In USA Free Shipping In USA
20 Year Warranty 20 Year Warranty
120 Night Sleep Trial 120 Night Sleep Trial

The Diamond Graphene Cool 14.5" Hybrid Mattress wraps a lofty quilted euro top construction around next-generation comfort. 

You can choose Medium, Firm, or Plush, letting every sleep position dial in the perfect feel. 

A layer of graphene-infused memory foam pulls heat away for breezy, breathable temperature regulation, while open-cell design melts pressure for those “ahh” moments. 

Because of this cooling layer, side- and back-sleepers enjoy deeper relief instead of tossing for cool spots. 

Underneath, individually wrapped coils are zoned to keep hips level and encourage enhanced spinal alignment without waking your partner (true motion isolation for couples). 

Finally, you get a 120-night sleep trial, a 20-year warranty, and free shipping in the USA.

CoolTouch Fabric

Conductive yarns whisk away body heat for all-night freshness.

Graphene Memory Foam

Absorbs pressure while delivering cooler, deep rejuvenating sleep.

Patented Zoned Coils

25% more support exactly where your back needs it. Ideal for posture.

Edge-to-Edge Stability

Maximizes usable surface so you can stretch right to the edge.

Easy-Move Bed-In-Box

Compact arrival glides through doorways. Setup takes minutes.

Key Mattress Benefits

Graphene Cool 14.5" Euro Top Quilted Hybrid Mattress by Diamond Mattress

6 Layers
Of Cooling
Comfort

Advanced cooling fabric pulls heat away from the body to maintain a fresh and breathable sleep surface.

Graphene-infused foam contours to pressure points while dispersing heat for a cooler and more comfortable sleep experience.

Textured foam enhances airflow and adds responsive cushioning for improved pressure relief.

Supportive transition foam stabilizes the body and ensures smooth weight distribution into the coil system below.

Individually wrapped coils provide targeted spinal alignment and reduce motion transfer for uninterrupted rest.

Durable base foam reinforces the mattress structure and ensures long-lasting support and stability.

Graphene Cool 14.5" Euro Top Quilted Hybrid Mattress by Diamond Mattress
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Whether its day or night, our dedicated team is always available to answer questions, resolve issues, and guide you through every step.

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Not sure which mattress suits you best? our sleep experts are here to help you choose the perfect option tailored to your comfort, health and lifestyle needs.

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Designed for deep comfort and better rest, so you wake up refreshed and ready for the day

A zoned coil core keeps the lumbar area lifted, which many back sleepers find supportive; those who prefer extra firmness can choose the Firm feel.

The mattress is 14.5 inches tall from base to quilted euro-top.

No. The CoolTouch cover and heat-dissipating cooling technology in the graphene foam actively draw warmth away for a cooler surface.

Medium, Firm, and Plush settings are offered, letting sleepers match their personal comfort.

Diamond lists the mattress as hybrid-compatible. Most modern adjustable bases that accept hybrids should work, but confirm clearance and hinge depth with your base manufacturer before purchase.

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