King Plush Medium Adjustable Bed Compatible Mattresses attresses with a Removable Cover 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.
Plush mattresses are the softest comfort level we carry — built with thick pillow-top and euro-top comfort layers (plus plush memory foam and hybrid options) that cradle your shoulders and hips for a soft, sink-in feel. Plush is the top choice for side sleepers and lighter-weight sleepers who need extra cushioning at the pressure points; back and stomach sleepers, or anyone who wants firmer support, may prefer our medium or firm options. Shop plush models from Sealy, Serta, Beautyrest, Stearns & Foster, iComfort and Tempur-Pedic in memory foam, hybrid and pocket-coil builds — with free delivery across Canada. • Feel: plush is the softest of our four comfort levels (plush, medium, firm, extra firm) • Best for: side sleepers and lighter-weight sleepers — cushions shoulders and hips • Consider firmer if: you sleep on your back or stomach, are heavier, or want more support • Plush constructions: pillow-top, euro-top, plush memory foam and hybrid • Builds: memory foam, hybrid and pocket-coil • Brands: Sealy, Serta, Beautyrest, Stearns & Foster, iComfort & Tempur-Pedic • Prices: from $224 to premium
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
Not every mattress can bend with an adjustable base — but these can. Every mattress here is built to flex with the head and foot articulation of an adjustable base without damaging the comfort layers, so you can read, relax in Zero-Gravity or elevate your legs with confidence. In fact, over 90% of our mattresses are adjustable-compatible, spanning memory foam, hybrid and pocket-coil constructions from every brand — NM, Sealy, Serta, Beautyrest, Tempur-Pedic, Stearns & Foster and more — at every budget from about $109 to premium. Foam and hybrid models flex most easily, while rigid, thick tight-top innersprings generally don't. Pair any of these with one of our adjustable bases, and every mattress comes with a 365-night sleep trial and free delivery across Canada. • What this means: mattresses built to flex with an adjustable base's head & foot articulation • Over 90% of our mattresses are adjustable-compatible — every brand, every budget ($109+) • Best constructions for adjustable bases: memory foam, hybrid and pocket-coil • What usually won't work: rigid, thick tight-top innersprings that don't bend • Pairs with our adjustable bases (including split-king for independent sides) • Every order: 365-night sleep trial, price-match guarantee & free Canada-wide delivery
Hundreds of our mattresses come with a removable, washable cover — unzip and take it off to machine-wash or spot-clean, which is great for allergies, kids, spills and keeping your bed fresh between deep cleans. These are mostly our foam, memory foam, gel-foam, latex and hybrid models — the bed-in-a-box-style builds — and they span value to luxury: NM, Springwall and Chirofoam, the Sealy Cocoon series, Serta iComfort and iComfort ECO latex, and Tempur-Pedic. You'll find every firmness from plush to extra firm, from about $109 to premium. Every mattress includes a 365-night sleep trial, price-match guarantee and free delivery across Canada. • What it means: a removable cover you can unzip to machine-wash or spot-clean • Great for: allergies, kids, spills, and keeping your mattress fresh • A large selection — mostly foam, memory foam, latex and hybrid (boxed-style) builds • Spans value to luxury: NM, Springwall, Chirofoam, Sealy Cocoon, Serta iComfort & iComfort ECO, Tempur-Pedic • Firmness from plush to extra firm, from about $109 to premium • 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 Plush Medium Adjustable Bed Compatible Mattresses attresses with a Removable Cover 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 3
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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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    Free delivery availability icon Free delivery to M5H 2N1 as soon as Tomorrow, Aug 3
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  • SEALY® Cocoon™ 8" Medium Firm Memory Foam Mattress
    LIMITED STOCK
    Sealy Cocoon 8-inch medium-firm memory foam mattress, white swirl-pattern top, black sides, Cocoon logo Sealy Cocoon Memory Foam Mattress Logo
    MEDIUM
    • Premium Fabric Cover
    • Perfect Fit Memory Foam
    • Personalized Comfort Layer
    • Essential Support Foam
    • 10 Year Warranty
    King In stock for fast delivery $1,025
    Compare at $2,399
    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 3
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  • SEALY® Cocoon™ 10" Plush Memory Foam Mattress
    LIMITED STOCK
    Sealy Cocoon 10-inch plush memory foam mattress, white pebbled knit top, charcoal Cocoon side band Sealy Cocoon Memory Foam Mattress Logo
    PLUSH
    • Premium Fabric Cover
    • Perfect Fit Memory Foam
    • Personalized Comfort Layer
    • Essential Support Foam
    • 10 Year Warranty
    King $1,273
    Compare at $2,999
    Online availability icon Backorder Available
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    Estimated delivery icon Estimated free delivery to M5H 2N1 on Tue, Aug 18
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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 18
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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 18
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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!
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    Free delivery availability icon Free delivery to M5H 2N1 as soon as Tomorrow, Aug 3
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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 18
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  • TEMPUR-PEDIC® Tempur-Align® 2.0 Blue 11" Soft Memory Foam Mattress
    EXCLUSIVE OFFER LIMITED STOCK
    Tempur-Pedic Tempur-Align 2.0 11-inch soft memory foam mattress, white wave-knit cover on navy base Tempurpedic Luxury Memory Foam Mattress Logo
    PLUSH
    • Premium Fabric Cover
    • Phase Change Material
    • TEMPUR® Material
    • New generation 2.0 enhancements
    King $3,499
    Compare at $5,099
    Online availability icon Backorder Available
    In-Store availability icon On Display:
    Estimated delivery icon Estimated free delivery to M5H 2N1 on Tue, Aug 18
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  • 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
    PLUSH
    • 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!
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    Free delivery availability icon Free delivery to M5H 2N1 as soon as Tomorrow, Aug 3
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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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