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Firm Medium Mattresses with Cooling Materials

Firm mattresses give you the most support of our everyday comfort levels — a solid, stable surface that keeps your spine aligned instead of sinking in. Firm is the go-to for back and stomach sleepers, heavier-weight sleepers who need extra support, and anyone looking for orthopedic, back-friendly comfort; side sleepers or those who like a softer feel may prefer our medium or plush options. Choose from tight-top, foam, euro-top and hybrid builds across Sealy, Serta, Beautyrest, Stearns & Foster, iComfort, Tempur-Pedic, Chirofoam and our own NM line — from budget-friendly models at $59 to premium, with free delivery across Canada. • Feel: firm gives a solid, supportive surface with minimal sink-in • Best for: back and stomach sleepers, heavier-weight sleepers, and orthopedic / back-pain support • Consider softer if you sleep on your side or want more cushioning — see our medium or plush options • Constructions: tight-top (most firm beds), foam, euro-top and hybrid • Brands: Sealy, Serta, Beautyrest, Stearns & Foster, iComfort, Tempur-Pedic, Chirofoam, Springwall & NM • Prices: from $59 (budget) to premium — our widest price range • Want the firmest feel? See our extra-firm mattresses
Medium-firmness mattresses — often called medium-firm — sit right between plush and firm, which is why they're the most popular and versatile feel we carry. You get enough cushioning to relieve pressure with enough support to keep your spine aligned, making medium a safe choice for back sleepers, combination sleepers who change positions through the night, and couples who need a compromise between two preferences. Shop medium models from Sealy, Serta, Beautyrest, Stearns & Foster, iComfort and Tempur-Pedic across memory foam, hybrid, euro-top, pillow-top and tight-top builds — with free delivery across Canada. • Feel: medium sits between plush and firm — balanced and the most versatile of our four comfort levels • Also called "medium-firm" — the middle of the firmness scale • Best for: back sleepers, combination sleepers, couples, and most body types • Consider plush if you sleep on your side; firm if you sleep on your stomach or want more support • Constructions: euro-top, tight-top, pillow-top, memory foam and hybrid • Brands: Sealy, Serta, Beautyrest, Stearns & Foster, iComfort, Tempur-Pedic, Springwall & NM • Prices: from $171 to premium

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.

Firm Medium Cooling
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  • Serta Perfect Sleeper Premium 15-inch firm pillow-top, deep-blue burst quilting, charcoal sides Serta Perfect Sleeper Premium Mattress Logo
    • 1000 Series 3-Zoned Coil System
    • CoolFeel Fabric™
    • Serta® Antimicrobial Fibre
    • Cool Twist® Gel Memory Foam
    • Serta® Support Foam
    • Designed and Made in Canada
    Single/Twin SOLD OUT
    Twin XL SOLD OUT
    Double/Full SOLD OUT
    Queen SOLD OUT
    Compare at $2,299
    King SOLD OUT
    Online availability icon Out Of Stock
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  • Beautyrest Hospitality 12-inch luxury-firm tight-top mattress, flat white quilted top, grey piping Beautyrest Hospitality Mattres Logo
    • Beautyrest® Pocketed Coil® Technology
    • Silver-Enhanced Antimicrobial Fiber Cover
    • DualCool™ Performance Layer
    • AirCool® Gel-Infused Foam
    • 10 Year Warranty
    • Made In Canada
    Twin XL In stock for fast delivery $773
    Compare at $2,499
    Online availability icon In-Stock Only 1 left!
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  • SERTA® Perfect Sleeper® 15.5" Firm Euro Top Mattress - 1 Serta Perfect Sleeper Premium Mattress Logo
    • 1050 3-Zoned Coil System
    • CoolFeel™ Plus Fabric
    • QuiltLoft™ Memory Foam
    • Cool Twist® Gel Memory Foam
    • Serta® Support Foam
    • 10 Year Warranty
    • Made In Canada
    Single/Twin $1,037
    Twin XL In stock for fast delivery $1,089
    Double/Full $1,106
    Queen $1,159
    Compare at $2,799
    King $1,326
    Online availability icon In-Stock Only 3 left!
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  • Sealy Posturepedic Luxury 14.5-inch medium-firm hybrid euro-top mattress, quilted white top, charcoal sides Sealy Posturepedic Luxury Mattress Logo
    • SealyMAX™ Core System featuring SealyResponse™ PRO & SolidSupport™ Pocket Coils
    • GelSense™ MAX Memory Foam
    • SealySupport™ Gel HD Foam
    • SupremeLoft™ Quilt featuring Silk & Wool
    • SealyCool™ Fabric
    • SolidEdge™ PRO Coil Edge
    Twin XL In stock for fast delivery $1,066
    Double/Full $1,082
    Queen $1,175
    Compare at $2,799
    King $1,371
    Online availability icon In-Stock Only 1 left!
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  • Serta Perfect Comfort X 13-inch firm tight-top mattress, charcoal cover, black-white feather quilt Serta Perfect Comfort X Luxury Mattress Logo
    • 1250 Series 5 ZoneActive™ Pocket Coil System
    • Perfect Conform™ Graphite Memory Foam
    • CoolFeel Fabric™
    • QuiltLoft™ Memory Foam
    • PerfectPure™ Fibre
    • Designed and Made in Canada
    Twin XL In stock for fast delivery $1,002
    Double/Full $1,089
    Queen $1,178
    Compare at $2,899
    King $1,461
    Online availability icon In-Stock Only 4 left!
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  • Beautyrest World Class 12.5-inch hybrid medium-firm mattress, angled view with blue chevron top and blue trim Beautyrest World Class Mattress Collection Logo
    • 1000 Beautyrest® Pocketed Coil Technology
    • Beautyrest® ActiveResponse Memory Foam
    • Beautyrest® Medium Gel Foam
    • World Class Relief™ HD Foam
    • InfiniCool™ Technology
    Twin XL In stock for fast delivery $1,125
    Double/Full $1,142
    Queen $1,196
    Compare at $2,899
    King In stock for fast delivery $1,363
    Online availability icon In-Stock Only 5 left!
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  • Beautyrest World Class 12.5-inch firm hybrid mattress, low-profile teal chevron tight-top, grey sides Beautyrest World Class Mattress Collection Logo
    • 1000 Beautyrest® Pocketed Coil Technology
    • Beautyrest® ActiveResponse Memory Foam
    • Beautyrest® Firm Gel Foam
    • World Class Relief™ HD Foam
    • InfiniCool™ Technology
    Twin XL In stock for fast delivery $1,125
    Double/Full In stock for fast delivery $1,142
    Queen In stock for fast delivery $1,196
    Compare at $2,899
    King $1,363
    Online availability icon In-Stock Only 6 left!
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  • MLILY Manchester United Dream 12" Memory Foam Mattress, white top with black-and-red sides and crest tag MLILY® Manchester United collection logo
    • Bamboo Charcoal AeroFusion™ Memory Foam
    • AdaptiFoam™ Comfort Layer
    • Flex Support Base Foam
    • Breathable Tencel® Cover
    • 10 Year Warranty
    Single/Twin $799
    Twin XL $859
    Double/Full $1,039
    Queen In stock for fast delivery $1,199
    Compare at $2,199
    King $1,459
    Online availability icon In-Stock Only 4 left!
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  • Beautyrest World Class 13-inch tight top firm mattress, angled view with teal top and purple trim Beautyrest World Class Mattress Collection Logo
    • 1000 Beautyrest® Pocketed Coil Technology
    • Beautyrest® ActiveResponse Memory Foam
    • SurfaceTouch™ Gel Memory Foam
    • World Class Relief™ HD Foam
    • InfiniCool™ MAX Technology
    • Beautyrest® Natural Lux Fibre Technology
    Single/Twin In stock for fast delivery $969
    Twin XL In stock for fast delivery $1,196
    Double/Full In stock for fast delivery $1,214
    Queen In stock for fast delivery $1,270
    Compare at $2,999
    King $1,438
    Online availability icon In-Stock Only 8 left!
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  • Beautyrest World Class 13-inch medium-firm tight-top mattress, teal quilted top, charcoal sides with magenta piping Beautyrest World Class Mattress Collection Logo
    • 1000 Beautyrest® Pocketed Coil Technology
    • Beautyrest® ActiveResponse Memory Foam
    • SurfaceTouch™ Gel Memory Foam
    • World Class Relief™ HD Foam
    • InfiniCool™ MAX Technology
    • Beautyrest® Natural Lux Fibre Technology
    Single/Twin In stock for fast delivery $1,142
    Twin XL In stock for fast delivery $1,196
    Double/Full $1,214
    Queen $1,270
    Compare at $2,999
    King $1,438
    Online availability icon In-Stock Only 5 left!
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  • Serta Perfect Comfort X 14-inch medium firm euro-top mattress, charcoal cover, grey feather quilt top Serta Perfect Comfort X Luxury Mattress Logo
    • 1250 Series 5 ZoneActive™ Pocket Coil System
    • Perfect Conform™ Graphite Memory Foam
    • CoolFeel Fabric™
    • QuiltLoft™ Memory Foam
    • PerfectPure™ Fibre
    • Designed and Made in Canada
    Twin XL In stock for fast delivery $1,149
    Double/Full $1,239
    Queen $1,323
    Compare at $3,199
    King $1,614
    Online availability icon In-Stock Only 4 left!
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  • SERTA® iComfort® Zip 13" Medium Mattress - Queen Split Head - 1 Serta iComfort Logo
    • 6″ Serta® StablCore™ High-Density Foam Core
    • CoolTemp™ Zippered Cover
    • Perfect Conform™ Graphite Memory Foam
    • Serta® Medium Support Foam
    • Comfort Foam
    • 10 Year Warranty
    • Made In Canada
    Twin XL In stock for fast delivery $1,164
    Double/Full $1,253
    Queen $1,345
    Compare at $3,299
    Queen Split Head $1,483
    King $1,628
    King Split Head $1,839
    Online availability icon In-Stock Only 7 left!
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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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