King Serta® Top-Rated 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.
Serta mattresses balance comfort and support with cooling-gel foams and proven coil systems, from a name trusted in Canadian bedrooms for decades. Compare every option below by feel, size, and price.
These are our top-rated mattresses — the highest-rated, best-reviewed beds chosen by verified customer reviews. Instead of guessing, shop the models real Canadians rate most highly for comfort, support and durability, spanning every brand and comfort level from plush to firm. Every mattress is backed by our 365-night sleep trial, price-match guarantee and manufacturer's warranty, and ships free across Canada — so a top-rated pick is an easy, low-risk choice. Browse best-reviewed models from Sealy, Serta, Beautyrest, Tempur-Pedic, Stearns & Foster and our own NM line. • What "top-rated" means: our highest-rated mattresses by verified customer reviews • Rated by real Canadians for comfort, support and durability • Spans every brand and comfort level (plush, medium, firm, extra firm) • Every order: 365-night sleep trial, price-match guarantee and manufacturer's warranty • Free delivery across Canada • Brands include Sealy, Serta, Beautyrest, Tempur-Pedic, Stearns & Foster & NM
King Serta® Top-Rated Mattresses Mattress Selector

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  • SERTA® Modern Series™ 8" Medium Firm Gel Foam Mattress
    BEST IN CLASS TOP RATED LIMITED STOCK
    Serta Modern Series 8-inch medium-firm gel foam mattress, low-profile white geometric cover, navy base Serta Modern Series Memory Foam Mattress Logo
    MEDIUM
    • 8 Inch Model with Double Layers of Comfort
    • Serta CoolWick Breathable Cover
    • PureComfort Gel Foam with PureComfort Foam Support Core
    • Designed and Built in Canada
    King $653
    Compare at $1,499
    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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  • SERTA® Modern Series™ 10" Extra-Firm Gel Foam Mattress
    TOP RATED LIMITED STOCK
    Serta Modern Series 10-inch extra-firm gel foam mattress, white geometric cover, navy fabric base Serta Modern Series Memory Foam Mattress Logo
    EX-FIRM
    • 10 Inch Model with Double Layers of Comfort
    • Serta CoolWick Breathable Cover
    • PureComfort Gel Foam with PureComfort Foam Support Core
    • Designed and Built in Canada
    King $765
    Compare at $1,799
    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® Modern Series™ 10" Medium Firm Gel Foam Mattress
    TOP RATED LIMITED STOCK
    Serta Modern Series 10-inch medium-firm gel foam mattress, white geometric cover on navy fabric base Serta Modern Series Memory Foam Mattress Logo
    MEDIUM
    • 10 Inch Model with Double Layers of Comfort
    • Serta CoolWick Breathable Cover
    • PureComfort Gel Foam with PureComfort Foam Support Core
    • Designed and Built in Canada
    King $765
    Compare at $1,799
    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® Classic® 11" Plush Euro Top Mattress
    BEST IN CLASS TOP RATED LIMITED STOCK
    Serta Classic 11-inch plush euro-top mattress, white quilted top, navy floral sides Serta Classic Mattress Logo
    PLUSH
    • 800 Edition Custom Support Coil System
    • 3 Zone Body Support
    • Serta® PillowSoft® Foam
    • Serta® Anti-Microbial Fibre Technology
    • Serta® Best Edge® Foam Encasement
    • Designed and Made in Canada
    King $795
    Compare at $1,899
    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® Classic® 11.5" Extra-Firm Tight Top Mattress
    TOP RATED LIMITED STOCK
    Serta Classic 11.5-inch extra-firm tight-top mattress, blue-white ombre top, navy floral sides Serta Classic Mattress Logo
    EX-FIRM
    • 800 Edition Custom Support Coil System
    • 3 Zone Body Support
    • Cool Twist® Gel Memory Foam + Serta® Support Gel Foam
    • Serta® Anti-Microbial Fibre Technology
    • Serta® Best Edge® Foam Encasement
    • Designed and Made in Canada
    King $885
    Compare at $2,099
    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® Classic® 12.5" Medium Euro Top Mattress
    BEST IN CLASS TOP RATED LIMITED STOCK
    Serta Classic 12.5-inch medium euro-top mattress, blue-white ombre plush top, navy floral sides Serta Classic Mattress Logo
    MEDIUM
    • 800 Edition Custom Support Coil System
    • 3 Zone Body Support + Serta® Support Gel Foam
    • Cool Twist® Gel Memory Foam + Serta® PillowSoft® Foam
    • Serta® Anti-Microbial Fibre Technology
    • Serta® Best Edge® Foam Encasement
    • Designed and Made in Canada
    King $922
    Compare at $2,199
    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® Classic® 12.5" Luxury Plush Euro Top Mattress
    TOP RATED LIMITED STOCK
    Serta Classic 12.5-inch luxury-plush euro-top mattress, deep blue-white ombre top, navy floral sides Serta Classic Mattress Logo
    PLUSH
    • 800 Edition Custom Support Coil System
    • 3 Zone Body Support
    • Cool Twist® Gel Memory Foam + Serta® PillowSoft® Gel Foam
    • Serta® Anti-Microbial Fibre Technology
    • Serta® Best Edge® Foam Encasement
    • Designed and Made in Canada
    King $922
    Compare at $2,199
    Online availability icon Backorder Available
    In-Store availability icon On Display:
    Estimated delivery icon Estimated free delivery to M5H 2N1 on Tue, Aug 18
    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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