Onyx Ice Hyper Cool PCM & Graphene 14
Onyx Ice Hyper Cool PCM & Graphene 14
Onyx Ice Hyper Cool PCM & Graphene 14
Onyx Ice Hyper Cool PCM & Graphene 14
Onyx Ice Hyper Cool PCM & Graphene 14
Onyx Ice Hyper Cool PCM & Graphene 14
Onyx Ice Hyper Cool PCM & Graphene 14
Onyx Ice Hyper Cool PCM & Graphene 14
Onyx Ice Hyper Cool PCM & Graphene 14
Onyx Ice Hyper Cool PCM & Graphene 14
Onyx Ice Hyper Cool PCM & Graphene 14
Onyx Ice Hyper Cool PCM & Graphene 14
Onyx Ice Hyper Cool PCM & Graphene 14
Onyx Ice Hyper Cool PCM & Graphene 14
Onyx Ice Hyper Cool PCM & Graphene 14" Firm Mattress by Diamond

Brand: Diamond
$1,699.99
$1,899.00
Save $199.01
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Best For

Back & Stomach Sleepers

Firmness

Firm Comfort

Only 15 left in stock

Will Ship between

120 Night Sleep Trial

Take your dream bed home & rest easy—love it or your money back, plus we’ll find you a better fit.
Title

20 Year Warranty

20-year non-prorated warranty.
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Free USA Wide Delivery

We offer free delivery on orders over $100. Ready to ship in 2-4 business days.

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Product Description

Enjoy a weightless feel and orthopedic support, with our exclusive Graphene Bounce Foam & Responsive Gel Memory Foam that provides precise body contouring while the removable CoolTouch cover actively regulates temperature. Designed with a 6-inch orthopedic supportive core, the Onyx Ice foam mattress will keep you cool while providing optimal alignment and pressure relief.

  • Removable Zipper Cover w/Direct Contact Design
  • Cool Touch Temperature Regulating Fabric
  • Hyper-Cool PCM Active Cooling Layer
  • 2" Silver Cool Memory Foam
  • 2" Graphene Hyperconductive Cool Memory Foam
  • Certipur HD Comfort Layers
  • HD Responsive Support Core

Mattress Size

✅ Twin: Provides a comfortable sleep space for one child or adult.  

✅ Dimensions: 39" wide x 75" long.

 

✅ Twin XL: Perfect for taller individuals, ensuring a comfortable sleep.

✅ Dimensions: 39" wide x 80" long.

 

✅ Full: Children, Single Adults, Adults with Children and/or Pets

✅ Dimensions: 54" wide x 75" long.

 

✅ Queen: The most popular size, providing ample space for two adults to sleep comfortably. 

✅ Dimensions: 60" wide x 80" long.

 

✅ King: Experience generous space without crowding your partner. 

✅ Dimensions: 76" wide x 80" long.

 

✅ California King: Perfect for taller partners, Experience generous space without crowding your partner.

✅ Dimensions: 72" wide x  84" long.

Product Overview

Enjoy a weightless feel and orthopedic support, with our exclusive Graphene Bounce Foam & Responsive Gel Memory Foam that provides precise body contouring while the removable CoolTouch cover actively regulates temperature. Designed with a 6-inch orthopedic supportive core, the Onyx Ice foam mattress will keep you cool while providing optimal alignment and pressure relief.

  • Removable Zipper Cover w/Direct Contact Design
  • Cool Touch Temperature Regulating Fabric
  • Hyper-Cool PCM Active Cooling Layer
  • 2" Silver Cool Memory Foam
  • 2" Graphene Hyperconductive Cool Memory Foam
  • Certipur HD Comfort Layers
  • HD Responsive Support Core
key mattress benefits
CoolTouch Temperature Regulating Fabric 

This cover is designed with CoolTouch technology and a Direct Contact Design, offering an actively cooling surface that can be easily removed for cleaning.
Hyper-Cool PCM and Graphene Memory Foam Layers

Featuring a Hyper-Cool PCM (Phase Change Material) layer combined with 2 inches of graphene-infused memory foam, this mattress draws away excess heat and adapts to your body for a cool, comfortable sleep experience.
HD Responsive Support Core

A 6-inch orthopedic HD support core offers robust, firm support, promoting spinal alignment and relieving pressure for optimal body support throughout the night.
Silver Cool Memory Foam

The 2-inch Silver Cool Memory Foam provides additional cooling and cushioning, enhancing body contouring while keeping the sleep surface fresh and temperature-regulated.
Firm comfort

Perfect for those who enjoy a firm feel with a touch of softness, these mattresses offer sturdy support with a bit of cushioning for initial comfort. Ideal for sleepers who find comfort even on hard surfaces and prefer a stable, supportive sleep experience.

not sure if this is the right mattress for you?

If you're unsure whether this is the perfect mattress for you, don't hesitate to reach out to our sleep experts for personalized recommendations. We're always happy to assist our customers in finding the ideal mattress that fits both their comfort needs and budget.

Talk To a Sleep Expert

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what our customers say?

Customer Reviews

Based on 47 reviews
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W
Wendy J.
Perfect

Needed a twin mattress for our boys new twin over full bunk beds. Our 6 year old seems to sleep really well on it. Would recommend to other parents - good quality for the price.

M
Molly B.
size is exactly what i ordered

Firm mattress did go to 14 inch in about 2 days great mattress for the price would buy again

N
Natalie H.
It is very comfortable to use, high in quality and low in price, I recommend everyone to buy it

It is very comfortable to use, high in quality and low in price, I recommend everyone to buy it, The quality is very good, warm in winter and cool in summer, cheap, very comfortable to use

B
Becky T.
Excellent Customer Service

The cloudy company has excellent customer service. You won't be disappointed.

B
Bonnie C.
Great mattress

This is a fantastic mattress for those who want one that is a little softer

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Address - 6075 Old Canton Rd, Jackson Ms 39211

Phone Number - 800-540-9851

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(Mon-Fri 10am - 5pm CT)

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Onyx Ice Hyper Cool PCM & Graphene 14
Onyx Ice Hyper Cool PCM & Graphene 14
Onyx Ice Hyper Cool PCM & Graphene 14
Onyx Ice Hyper Cool PCM & Graphene 14
Onyx Ice Hyper Cool PCM & Graphene 14
Onyx Ice Hyper Cool PCM & Graphene 14
Onyx Ice Hyper Cool PCM & Graphene 14

Onyx Ice Hyper Cool PCM & Graphene 14" Firm Mattress by Diamond

$1,699.99