King Memory Foam Temperature-Regulating Mattresses Edge Support Mattresses White Mattresses Mattress Selector

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.
Memory foam mattresses contour to your body, relieving pressure at the hips and shoulders while absorbing motion so you won't feel your partner move. They give a cradling, "hug" feel that suits side sleepers and couples. Browse every memory foam option below by brand, feel, and profile.
A temperature-regulating mattress works to keep you at a comfortable, balanced temperature all night and all year — not just cooling you down, but adapting as your body and the seasons change so you don't wake up too hot or too cold. These mattresses use heat-responsive and breathable materials — phase-change covers, gel and graphite foams, Tencel and natural fibres, and airflow-promoting coils — to absorb and release warmth as needed. It's ideal if you run hot and cold, share a bed with a partner who sleeps at a different temperature, or just want consistent comfort through every season. You'll find temperature-regulating builds across every brand — Sealy, Serta, Beautyrest, iComfort, Tempur-Pedic, Chirofoam and our own NM line. Sleep hot specifically? See our cooling mattresses. Every mattress includes a 365-night sleep trial and free delivery across Canada. • What it does: holds a balanced, neutral temperature — adapts so you're not too hot or too cold • How it works: phase-change covers, gel & graphite foams, Tencel/natural fibres and breathable coil airflow • Best for: people who run hot and cold, couples with different sleep temperatures, and year-round comfort • Cooling vs regulating: cooling sleeps cold (for hot sleepers); regulating holds a steady, balanced temp • Across every brand and firmness • Every order: 365-night sleep trial, price-match guarantee & free Canada-wide delivery
Edge support mattresses are reinforced around the perimeter so the edge feels as solid as the middle — you can sleep right up to the side without that sinking, roll-off feeling, sit on the edge to get dressed without it caving, and use the full surface of the bed. It's a feature that matters most for couples sharing the space, anyone who sits on the edge to get in and out of bed, and heavier-weight sleepers. These are mostly our pocket-coil and hybrid mattresses with full-perimeter coils or foam-encased edges — from Springwall (Full Perimeter Comfort Pockets), Sealy, Serta, Beautyrest, iComfort, Stearns & Foster and our own NM line. Every mattress includes a 365-night sleep trial and free delivery across Canada. • What it does: a reinforced perimeter so the edge stays firm — no sinking or rolling off • Why it matters: more usable sleep surface, easier to sit on the edge and get in and out of bed • Best for: couples sharing space, anyone who sits on the edge, and heavier-weight sleepers • How it works: full-perimeter pocket coils or foam-encased edges (mostly coil & hybrid; all-foam edges are softer) • Brands: Springwall (Full Perimeter Comfort Pockets), Sealy, Serta, Beautyrest, iComfort, Stearns & Foster & NM • Every order: 365-night sleep trial, price-match guarantee & free Canada-wide delivery

Most of our mattresses come in a clean, neutral white or off-white cover — and since that cover sits under your sheets, colour won't change how you sleep. To find the right bed, shop by what actually matters: your size (twin to king), your comfort level (plush, medium, firm), or your preferred type (memory foam, hybrid, pocket coil). Every mattress includes a 365-night sleep trial and free delivery across Canada.
King Memory Foam Temperature-Regulating Mattresses Edge Support Mattresses White Mattresses Mattress Selector

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  • NM Cozy 8" Medium Firm Memory Foam Mattress
    CLEARANCE FLASH SALE BEST IN CLASS
    National Mattress 8-inch medium-firm memory-foam mattress, smooth white tight-top, charcoal sides, NM badge NM Cozy Collection Logo
    MEDIUM
    • High Density Foam Core
    • Cool Gel Memory Foam
    • Hypoallergenic Bamboo Cover
    • 10 Year Warranty
    • Made In Toronto, Canada
    King In stock for fast delivery $579
    Compare at $1,199
    Online availability icon In-Stock Only 4 left!
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    Free delivery availability icon Free delivery to M5H 2N1 as soon as Tomorrow, Aug 7
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    M5H 2N1
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  • NM Cozy 10" Firm Memory Foam Mattress
    BEST IN CLASS TOP RATED TRENDING
    National Mattress 10-inch firm memory-foam mattress, white channel-quilted tight-top, grey woven sides NM Cozy Collection Logo
    FIRM
    • Optimal High Resilient Bio-Foam Core
    • Visco Memory Foam
    • Pressure Relieving Comfort Foam
    • Cotton Channel Quilted Cover
    • 10 Year Warranty
    • Made In Toronto, Canada
    King In stock for fast delivery $887
    Compare at $1,599
    Online availability icon In-Stock Only 4 left!
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    Free delivery availability icon Free delivery to M5H 2N1 as soon as Tomorrow, Aug 7
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    M5H 2N1
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  • CHIROFOAM™ XF 10" Extra-Firm Memory Foam Mattress
    BEST IN CLASS BEST SELLING TOP RATED
    Chirofoam XF 10-inch extra-firm memory foam mattress, white geometric-knit top, pale blue edge, navy sides Chirofoam Logo
    EX-FIRM
    • Cool Gel Infused Memory Foam
    • Extra Firm Support Chirofoam
    • Pro Lumbar Support
    • Body Support Bio Foam Core
    • 15 Year Warranty
    King In stock for fast delivery $954
    Compare at $1,699
    Online availability icon In-Stock Only 2 left!
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    Free delivery availability icon Free delivery to M5H 2N1 as soon as Tomorrow, Aug 7
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  • NM Cozy 12" Medium Firm Memory Foam Mattress
    BEST IN CLASS TOP RATED TRENDING
    National Mattress 12-inch medium-firm memory-foam mattress, tall white channel-quilted top, grey woven sides NM Cozy Collection Logo
    MEDIUM
    • Optimal High Resilient Bio-Foam Core
    • Gel Infused Visco Memory Foam
    • Cotton Channel Quilted Cover
    • 10 Year Warranty
    • Made In Toronto, Canada
    King In stock for fast delivery $967
    Compare at $1,799
    Online availability icon In-Stock Only 3 left!
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  • CHIROFOAM™ 12" Luxury Firm Memory Foam Mattress
    BEST IN CLASS TOP RATED TRENDING
    Chirofoam 12-inch luxury-firm memory foam mattress, smooth white knit top, pale blue edge, navy sides Chirofoam Logo
    FIRM
    • Cool Gel Infused Memory Foam
    • Firm Support Chirofoam
    • Pro Lumbar Support
    • Body Support Bio Foam Core
    • 15 Year Warranty
    King In stock for fast delivery $1,108
    Compare at $1,999
    Online availability icon In-Stock
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  • 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
    FIRM
    • 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, Aug 25
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  • 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
    FIRM
    • 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!
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  • 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
    MEDIUM
    • 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
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    Estimated delivery icon Estimated free delivery to M5H 2N1 on Tue, Aug 25
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  • SERTA® iComfort® 13" Plush Memory Foam Mattress
    EXCLUSIVE OFFER LIMITED STOCK
    Serta iComfort 13-inch plush memory foam mattress, blue-white quilted swirl top, charcoal woven sides Serta iComfort Logo
    PLUSH
    • 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
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    Estimated delivery icon Estimated free delivery to M5H 2N1 on Tue, Aug 25
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  • TEMPUR-PEDIC® Tempur-Align® 2.0 Teal 10" Medium Firm Memory Foam Mattress
    FLASH SALE BEST IN CLASS EXCLUSIVE OFFER
    Tempur-Pedic Tempur-Align 2.0 10-inch medium firm memory foam mattress, white wave-knit top on navy base Tempurpedic Luxury Memory Foam Mattress Logo
    MEDIUM
    • Premium Fabric Cover
    • TEMPUR® Material
    • New generation 2.0 enhancements
    • Voted Product Of The Year
    King $2,849
    Compare at $4,099
    Online availability icon Backorder Available
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    Estimated delivery icon Estimated free delivery to M5H 2N1 on Tue, Aug 25
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  • 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
    PLUSH
    • 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 $2,999
    Compare at $4,499
    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, Aug 7
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  • 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
    PLUSH
    • 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, Aug 25
    View Details

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Upgrade your sleep at National Mattress

Discover a mattress that transforms your sleep into a truly rejuvenating experience. We offer a wide variety of options to suit every sleep style and preference, ensuring a better night's sleep.

Why Choose Us?

  • Variety: From plush to firm, we have options for every body type and sleep style.
  • Quality: Trusted brands and top-notch materials for long-lasting comfort.
  • Sleep Trials & Warranties: Enjoy peace of mind with flexible trials and warranties.
  • Expert Advice: Get personalized recommendations from our sleep specialists.

Mattress Selection Includes

  • Memory Foam: Contours to your body for personalized comfort and pressure relief.
  • Hybrid: Combines responsive springs with foam for balanced support and comfort.
  • Innerspring: Provides firm support, bounce, and cooling airflow.
  • Latex: Hypoallergenic, eco-friendly, and exceptionally comfortable.
  • Adjustable Beds: Customize your sleep position for optimal comfort.
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