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King Serta® iComfort® Mattresses with Cooling Materials

King mattresses measure 76" × 80" — the widest standard size, giving each partner the same personal space as a twin. They're the top choice for couples who want maximum room, families who co-sleep, and larger master bedrooms. Compare every king option below by brand, feel, and price.
iComfort by Serta features advanced cooling foams and gel technology that draw heat away for a cooler night's sleep. Compare every option below by feel, size, and price.

Shop cooling mattresses from Serta, Sealy, Beautyrest, Tempur-Pedic, iComfort, Springwall, and more at National Mattress, featuring gel-infused foam, graphite-infused foam, naturally breathable latex, and coil airflow systems in a wide range of models across every size from Single/Twin to King. Prices run from budget-friendly to luxury, with comfort levels from extra firm to plush. Every cooling mattress is CertiPUR-US® certified, manufactured in Canadian factories, and ships with free express delivery, a 365-night sleep trial, and manufacturer warranty coverage.

King Serta® iComfort® Cooling
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Items

Items

  • SERTA® iComfort® 11.5" Firm Memory Foam Mattress
    FLASH SALE BEST IN CLASS EXCLUSIVE OFFER
    Serta iComfort 11.5-inch firm memory foam mattress, blue-white quilted swirl top, charcoal sides Serta iComfort Logo
    • CoolFeel™ Fabric
    • 5 ZoneResponse™ Design
    • Perfect Conform™ Graphite Memory Foam
    • iComfort® Gel Memory Foam
    • CertiPUR-US® certified foams.
    • 100% Canada Assembled
    King $2,099
    Compare at $3,099
    Online availability icon Backorder Available
    In-Store availability icon On Display:
    Estimated delivery icon Estimated free delivery to M5H 2N1 on Tue, Sep 29
  • SERTA® iComfort® 13" Plush Memory Foam Mattress
    FLASH SALE EXCLUSIVE OFFER LIMITED STOCK
    Serta iComfort 13-inch plush memory foam mattress, blue-white quilted swirl top, charcoal woven sides Serta iComfort Logo
    • CoolFeel™ Fabric
    • 5 ZoneResponse™ Design
    • Perfect Conform™ Graphite Memory Foam
    • iComfort® Gel Memory Foam
    • CertiPUR-US® certified foams.
    • 100% Canada Assembled
    King $2,499
    Compare at $3,699
    Online availability icon Backorder Available
    In-Store availability icon On Display:
    Estimated delivery icon Estimated free delivery to M5H 2N1 on Tue, Sep 29
  • SERTA® iComfort® 14" Firm Memory Foam Mattress
    FLASH SALE EXCLUSIVE OFFER LIMITED STOCK
    Serta iComfort 14-inch firm memory foam mattress, bold blue radial-quilt top, charcoal sides Serta iComfort Logo
    • CoolFeel™ Fabric
    • 5 ZoneResponse™ Design
    • Perfect Conform™ Graphite Memory Foam
    • Deep Reaction® Max Gel Memory Foam
    • CertiPUR-US® certified foams.
    • 100% Canada Assembled
    King In stock for fast delivery $2,499
    Compare at $4,499
    Online availability icon In-Stock Only 2 left!
    In-Store availability icon On Display:
    Free delivery availability icon Free delivery to M5H 2N1 as soon as Tomorrow, Sep 14
    Pickup available icon Only Pickup available to
    M5H 2N1
  • SERTA® iComfort® 13" Medium Firm Memory Foam Mattress
    FLASH SALE EXCLUSIVE OFFER LIMITED STOCK
    Serta iComfort 13-inch medium firm memory foam mattress, light blue swirl-quilt top, charcoal sides Serta iComfort Logo
    • CoolFeel™ Fabric
    • 5 ZoneResponse™ Design
    • Perfect Conform™ Graphite Memory Foam
    • Deep Reaction® Max Gel Memory Foam + iComfort® Gel Memory Foam
    • CertiPUR-US® certified foams.
    • 100% Canada Assembled
    King $2,499
    Compare at $3,699
    Online availability icon Backorder Available
    In-Store availability icon On Display:
    Estimated delivery icon Estimated free delivery to M5H 2N1 on Tue, Sep 29
  • SERTA® iComfort® 14" Plush Memory Foam Mattress
    FLASH SALE EXCLUSIVE OFFER LIMITED STOCK
    Serta iComfort 14-inch plush memory foam mattress, deep blue radial-quilt top, charcoal sides Serta iComfort Logo
    • CoolFeel™ Fabric
    • 5 ZoneResponse™ Design
    • Perfect Conform™ Graphite Memory Foam
    • Deep Reaction® Max Gel Memory Foam
    • CertiPUR-US® certified foams.
    • 100% Canada Assembled
    King $2,999
    Compare at $4,499
    Online availability icon Backorder Available
    In-Store availability icon On Display:
    Estimated delivery icon Estimated free delivery to M5H 2N1 on Tue, Sep 29
  • SERTA® iComfort® PRO 12.5" Plush Latex Mattress
    EXCLUSIVE OFFER LIMITED STOCK NEW ARRIVAL
    Serta iComfort PRO 12.5-inch plush latex mattress, puffy cream tufted top, denim-blue sides Serta iComfort Pro Memory Foam Mattress Logo
    • CoolFeel™ Pro System
    • 5 ZoneResponse™ Design
    • Graphite-Infused True Response™ Latex Foam
    • True Response™ Latex Foam
    • Derived from 100% Natural Latex
    • 100% Canada Assembled
    King $3,099
    Compare at $4,499
    Online availability icon Backorder Available
    In-Store availability icon On Display:
    Estimated delivery icon Estimated free delivery to M5H 2N1 on Tue, Sep 29
  • Serta iComfort PRO 14.5-inch plush euro-top latex mattress, cream top, grey gusset, blue sides Serta iComfort Pro Memory Foam Mattress Logo
    • CoolFeel™ Pro System
    • 5 ZoneResponse™ Design
    • 2X Graphite-Infused True Response™ Latex Foam
    • 2X True Response™ Latex Foam
    • Derived from 100% Natural Latex
    • 100% Canada Assembled
    King In stock for fast delivery $3,899
    Compare at $6,199
    Online availability icon In-Stock Only 1 left!
    In-Store availability icon On Display:
    Free delivery availability icon Free delivery to M5H 2N1 as soon as Tomorrow, Sep 14
    Pickup available icon Only Pickup available to
    M5H 2N1
  • Serta iComfort PRO 14.5-inch firm euro-top latex mattress, cream top, grey chevron gusset, blue sides Serta iComfort Pro Memory Foam Mattress Logo
    • CoolFeel™ Pro System
    • 5 ZoneResponse™ Design
    • 2X Graphite-Infused True Response™ Latex Foam
    • 2X True Response™ Latex Foam
    • Derived from 100% Natural Latex
    • 100% Canada Assembled
    King $3,899
    Compare at $6,199
    Online availability icon Backorder Available
    In-Store availability icon On Display:
    Estimated delivery icon Estimated free delivery to M5H 2N1 on Tue, Sep 29
  • SERTA® iComfort® PRO 12.5" Plush All-Latex Mattress
    EXCLUSIVE OFFER LIMITED STOCK NEW ARRIVAL
    Serta iComfort PRO 12.5-inch plush latex mattress, cream top, grey chevron print, blue sides Serta iComfort Pro Memory Foam Mattress Logo
    • CoolFeel™ Pro System
    • 5 ZoneResponse™ Design
    • Graphite-Infused True Response™ Latex Foam
    • True Response™ Latex Foam Core
    • Derived from 100% Natural Latex
    • 100% Canada Assembled
    King In stock for fast delivery $6,999
    Compare at $10,299
    Online availability icon In-Stock Only 2 left!
    In-Store availability icon On Display:
    Free delivery availability icon Free delivery to M5H 2N1 as soon as Tomorrow, Sep 14
    Pickup available icon Only Pickup available to
    M5H 2N1
  • SERTA® iComfort® PRO 12.5" Firm All-Latex Mattress
    EXCLUSIVE OFFER LIMITED STOCK NEW ARRIVAL
    Serta iComfort PRO 12.5-inch firm latex mattress, cream top, grey chevron print, denim-blue sides Serta iComfort Pro Memory Foam Mattress Logo
    • CoolFeel™ Pro System
    • 5 ZoneResponse™ Design
    • Graphite-Infused True Response™ Latex Foam
    • True Response™ Latex Foam Core
    • Derived from 100% Natural Latex
    • 100% Canada Assembled
    King In stock for fast delivery $6,999
    Compare at $10,299
    Online availability icon In-Stock Only 1 left!
    In-Store availability icon On Display:
    Free delivery availability icon Free delivery to M5H 2N1 as soon as Tomorrow, Sep 14
    Pickup available icon Only Pickup available to
    M5H 2N1

10 Items

How Cooling Materials Work in Modern Mattresses

A mattress’s cooling performance depends on its overall construction. Gel infusion can delay the initial warming of foam by increasing thermal mass; it does not provide a continuing path for heat to leave the bed. Natural latex has an open-cell structure that promotes continuous airflow without any added chemicals, and hybrid mattresses with individually wrapped coils create air channels beneath the comfort layers that vent heat away from the sleep surface.

When choosing a cooling mattress, match the technology to your sleep style. Hot sleepers who prefer a conforming feel can compare memory foam models from Serta, Serta iComfort, or Tempur-Pedic, paying attention to airflow and cover construction. If you want natural breathability without synthetic foams, Natura and Sealy Posturepedic Natural Origins offer latex-based options. Budget-conscious shoppers can find cooling gel foam mattresses from Springwall and NM. All cooling mattresses at National Mattress are manufactured in Canadian factories 🍁 and ship with free express delivery across Canada.

❄️

Gel-Infused Foam

Thermal-conductive gel beads absorb and dissipate body heat. Found in many models from Serta, Sealy, Beautyrest, and Springwall.

💨

Coil Airflow Systems

Individually wrapped pocket coils in innerspring and hybrid mattresses create air channels that continuously vent heat from the core.

🌱

Graphite & Copper Infusions

Compare the complete construction of Serta iComfort and Beautyrest models. An infusion name alone does not establish sustained cooling performance.

🧊

Cooling Cover Fabrics

Phase-change and moisture-wicking cover materials feel cool to the touch and regulate surface temperature throughout the night.

Frequently Asked Questions About Cooling Mattresses

What type of cooling mattress is best for hot sleepers?
Hybrid mattresses with gel-infused foam over pocket coils tend to sleep coolest because the coil system provides continuous airflow beneath the comfort layers. Latex models also sleep naturally cool due to their open-cell structure. Both types are available at National Mattress from brands like Sealy, Beautyrest, and Springwall.
What is the difference between gel foam, graphite foam, and latex for cooling?
Gel infusion increases foam’s thermal mass, slowing initial warming until it reaches equilibrium. Sustained ventilation depends on airflow through the foam, coils and cover. Latex has an open-cell structure, but compare the complete mattress rather than choosing by one material name.
How much do cooling mattresses cost at National Mattress?
Cooling mattresses at National Mattress span a range of budgets in Queen size. Budget gel foam models from Springwall and NM are the most affordable, mid-range options from Serta and Sealy fall in the middle, and premium models from Tempur-Pedic and Stearns & Foster sit at the top of the range. All orders include free delivery across Canada.
Are cooling mattresses available in all sizes?
Yes. National Mattress carries cooling mattresses in Single/Twin, Twin XL, Double/Full, Queen, King, and RV Short Queen sizes. Most models are available in all six sizes, with Twin XL popular for adjustable bed bases and King ideal for couples who both sleep warm.
Do cooling mattresses come with a sleep trial?
Every cooling mattress at National Mattress includes a 365-night sleep trial, the longest in Canadian mattress retail. This gives you a full year to confirm the cooling performance works for your body temperature and sleep habits, with hassle-free returns if it doesn’t.
Can I use a cooling mattress on an adjustable bed base?
Most cooling mattresses at National Mattress are compatible with adjustable bed bases. Foam, memory foam, latex, and hybrid models all flex with adjustable frames. Only some traditional innerspring models with rigid coil systems may not be suitable, check the product page or ask our sleep experts.

Not Sure Which Cooling Technology Is Right for You?

Our non-commissioned sleep experts can match you with the right cooling mattress based on your sleep position, body temperature, and budget, no sales pressure.

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