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Diamond Onyx Ice


  • CoolTouch Temperature Regulating Fabric:  Sleeps Cool
  • Graphene Ice: Active Temperature Regulation
  • Graphene Memory Foam:  Cooler and Deeper Sleep
  • High Density Orthopedic Support Core:  Support and Comfort
  • Available FeelsMedium

We offer this mattress in all traditional sizes: Twin XL, Full, Queen, Flex-Queen, Cal-King and Flex-King.

  • Hand-Tufted Tencel Fabric

  • Cool Copper Memory Foam

  • CertiPUR HD Comfort Layer

  • Individually Wrapped Coils
SizeDimension (inches)Depth (inches)
Cal King72 x 8411
King76 x 8011
Split King76 x 8011
Queen60 x 8011
Full53 x 7411
Twin XL38 x 8011
Twin38 x 7411

Diamond Mattress is a fourth-generation family-owned and operated company dedicated to people-first innovation to improve life and transform our relationship with sleep. Please review our warranty policy and care guidelines to ensure your full satisfaction of our products and understanding of how to care for it as well as its warranty coverage.


Diamond Mattress warrants your new Diamond Mattress mattress or foundation (the “Products”), except for bed handles, cover fabrics and corner guards, to be free from defects in material and workmanship (“defects”) existing at the time of manufacture and appearing within the applicable warranty period. Diamond Mattress’ standard warranty is a 20-10 Year Limited Non-Prorated Warranty. However, select direct contact models come with a 25-Year Non-Prorated Warranty.

The warranty is effective whether the mattress is purchased with matching foundation, or either mattress or foundation is purchased separately. However, use of an improper foundation may cause damage to the mattress and voids this warranty.

Diamond Mattress maintains sole discretion regarding the repair or replacement of products. Your product will be repaired or replaced without charge according to the terms set forth in this warranty, should the defect be due to faulty workmanship or structural defects. Charges will be applied for items not covered by the warranty, such as the mattress fabric and handles.

This warranty is valid only for the original purchaser, and valid only for residential use.
Contract and commercial usages are not covered by this warranty.