Skip to product information

 Diamond Lily Firm Gel Memory Foam Tight Top 12.5" Mattress

$ 1,399.00
$ 1,119.00

Mattress Description

Diamond Lily Firm Gel Memory Foam Tight Top 12.5" Mattress

Made in the USA (Los Angeles, CA), the Diamond Lily Firm Gel Memory Foam Tight Top 12.5" Mattress represents the latest in sleep technology, combining cutting-edge materials for temperature regulation and comfort.

Key Features:

  • Hyper Conductive Sparkle Foam: This innovative material regulates your core temperature, helping you fall asleep naturally while maintaining optimal comfort throughout the night.

  • Cool-Tencel Cover: This conductive fabric draws heat away from your body, enhancing the temperature-regulating properties of the mattress and contributing to a deep, restorative sleep.

  • Moisture Wicking Fabric: This fabric effectively absorbs and disperses moisture, helping to keep you dry and comfortable.

  • 5-Series Wrapped Coil: This coil system provides responsive support, adapting to your body's contours and movements for a personalized sleeping experience.

  • Ventilated Gel Memory Foam: This foam layer offers superior pressure relief while its ventilated design promotes airflow, contributing to a cool and comfortable sleep.

  • Tri-Zoned Foam Encasement Design: This design ensures that the mattress provides targeted support and comfort to different body areas.

This mattress is recommended for back and stomach sleepers who benefit from firm and consistent support.


All the foams in this mattress are CertiPUR-US® certified, ensuring they are safe and non-toxic. They are made without harmful substances such as ozone depleters, PBDE flame retardants, mercury, lead and other heavy metals, formaldehyde, and phthalates regulated by the Consumer Product Safety Commission. These foams also have low VOC (Volatile Organic Compound) emissions for better indoor air quality (less than 0.5 parts per million).

Experience the refreshing, restorative sleep you deserve with the Diamond Lily Firm Gel Memory Foam Tight Top 12.5" Mattress. Wake up feeling rejuvenated and ready to take on the day!

Mattress Size

Diamond Mattress provides a variety of sizes to fit any bedroom:

  • California King Mattress: 84" wide x 72" long
  • King Mattress: 76" wide x 80" long
  • Queen Mattress: 60" wide x 80" long
  • Full Mattress: 54" wide x 75" long
  • Twin XL Mattress: 39" wide x 80" long
  • Twin Mattress: 39" wide x 75" long

These sizes ensure comfort for both individuals and couples. Choose from spacious King or Queen sizes or compact Full, Twin XL, or Twin.

Diamond also offers sets including mattress and foundation:

  • King Mattress Set
  • California King Mattress Set
  • Queen Mattress Set
  • Full Mattress Set
  • Twin XL Mattress Set
  • Twin Mattress Set

Explore these options to find the perfect fit for your bedroom and enjoy a restful sleep on the Diamond Mattress.

120 Night, 100% Comfort Guarantee

At LA Mattress Store, your comfort is our guarantee across all brands. Not happy with your mattress within the initial 120 nights? Simply reach out to us for a one-time exchange. Your sound sleep and satisfaction remain our utmost priorities. For a complete understanding of this policy, please refer to the full policy here.

1-Year Price Guarantee

Shop your mattress at LA Mattress Store with utmost trust. We uphold our 1-year price guarantee - if you find a lower price at any local competitor*, we'll match it and refund 50% of the difference. This guarantee extends for a year after purchase, ensuring peaceful sleep with every rest. Full policy details are available here.

View full details

Diamond Lily Firm Gel Memory Foam Tight Top 12.5" Mattress

Experience Unmatched Comfort with Diamond Mattress

Experience the perfect blend of opulence and ease with Diamond Mattress. Offering a spectrum of sizes to cater to your personal preferences and requirements, it promises tranquility in your slumber. From the spaciousness of a King to the practicality of a Twin, Diamond Mattress caters to all. Its exceptional quality and dedication to customer satisfaction distinguish it from the rest. Unveil the secret to restful and uninterrupted sleep with Diamond Mattress.

Could you explain the 20-Year mattress warranty?

Should a defect occur, Diamond will solely be responsible, and your only recourse under this warranty will be as follows: For the initial decade of ownership, we will provide a brand new Diamond replacement mattress at no cost to you. After the first ten years, Diamond commits to either fully repair and recover your Diamond Mattress, or replace it entirely. Read Details.

Choosing the Ideal Sheets for Your Diamond Mattress

When choosing sheets for your Diamond mattress, most sheet sets will be suitable. However, it's important to verify the pocket depth of the fitted sheet to ensure a proper fit. To ensure an ideal fit, we offer our exclusive line of sheet sets specifically crafted for Diamond mattresses. Experience a cozy and secure sleep with our specially designed sheet sets.