King Medium Extra Firm Plush VIP Pricing on Mattresses Temperature-Regulating Mattresses Compatible with Adjustable Bed 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.
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
Extra firm mattresses are the firmest, most supportive feel we carry — a hard, no-sink surface that holds your body on top of the mattress rather than letting it settle in. They're built for stomach sleepers, heavier-weight sleepers and anyone who finds a standard firm mattress still too soft, delivering maximum support and spinal alignment. Most use a tight-top or high-density foam construction (including orthopedic Chirofoam), with budget-friendly options that keep extra-firm support affordable. Shop Beautyrest, Serta, Chirofoam, Springwall and our own NM line — from $152, with free delivery across Canada. • Feel: extra firm is the firmest of our four comfort levels — a hard, no-sink surface • Best for: stomach sleepers, heavier-weight sleepers, and anyone who wants maximum support • Choose this over firm if a standard firm mattress still feels too soft • Consider firm or medium if you sleep on your side or want any cushioning • Constructions: tight-top and high-density foam (including orthopedic Chirofoam) • Brands: Beautyrest, Serta, Chirofoam, Springwall & NM • Prices: from $152 — an affordable, value-focused selection
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
Get our lowest mattress prices by joining the National Mattress VIP Club — and it's free. Because top brands like Sealy, Serta, Beautyrest and Tempur-Pedic set a minimum advertised price, we can't show our best price publicly — so VIP members unlock it privately. Sign up free, get your member coupon code by email, and your VIP discount is applied right at checkout, saving up to 40% (over $1,000 on premium models). Membership also gets you early access to flash sales, exclusive monthly coupons and birthday rewards — and every order still comes with our 365-night sleep trial, price-match guarantee and free delivery across Canada. Join the VIP Club and see your member price. • Free to join — no fee, no catch • Members-only pricing on top brands, applied privately at checkout (save up to 40%, over $1,000 on premium beds) • Why "private"? Brands like Sealy & Tempur-Pedic restrict advertised prices — VIP unlocks the lower price for members • Also includes: early flash-sale access, exclusive monthly coupons & birthday rewards • How it works: sign up → get your coupon code by email → apply at checkout • Every order: 365-night sleep trial, price-match guarantee & free Canada-wide delivery
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
King Medium Extra Firm Plush VIP Pricing on Mattresses Temperature-Regulating Mattresses Compatible with Adjustable Bed Mattress Selector

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.

Loading recommendations...

Items

Express delivery icon
Clear all King Medium Extra Firm Plush VIP Pricing Temperature Regulating Compatible with Adjustable Bed

Items

King Medium Extra Firm Plush VIP Pricing Temperature Regulating Compatible with Adjustable Bed Clear all
  • BEAUTYREST® Centennial® 15.5" Pillow Top Medium-Firm Mattress
    FLASH SALE EXCLUSIVE OFFER LIMITED STOCK
    Beautyrest Centennial 15.5-inch pillow top medium-firm mattress, black sparkled pillow top with grey sides Beautyrest Centennial Luxury Mattress Logo
    MEDIUM
    • 1850 T3 Triple Stranded Pocketed Coil® and Micro Coil Technology
    • SurfaceTouch™ Gel Memory Foam
    • Self-Response™ Latex
    • Beautyrest® Gel Memory Foam
    • Beautyrest® Gel Support Foam
    • Sleep Climate™ Surface enhanced with cooling yarn
    King $1,700
    Compare at $4,199
    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
  • BEAUTYREST® Centennial® 16.5" Super Pillow Top Medium-Firm Mattress
    FLASH SALE BEST IN CLASS EXCLUSIVE OFFER
    Beautyrest Centennial 16.5-inch medium-firm super-pillow-top mattress, black gold-flecked top, charcoal sides Beautyrest Centennial Luxury Mattress Logo
    MEDIUM
    • 2850 T3 Triple Stranded Pocketed Coil® and Micro Coil Technology
    • SurfaceTouch™ Gel Memory Foam
    • Self-Response™ Latex
    • Micro Diamond™ Memory Foam
    • Beautyrest® Gel Memory Foam
    • Sleep Climate™ Surface enhanced with cooling yarn
    King $1,760
    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
    View Details
  • BEAUTYREST® Centennial® 13.5" Tight Top Medium-Firm Mattress
    EXCLUSIVE OFFER LIMITED STOCK
    Beautyrest Centennial 13.5-inch tight top medium-firm mattress, black sparkled top with grey sides Beautyrest Centennial Luxury Mattress Logo
    MEDIUM
    • 1850 T3 Triple Stranded Pocketed Coil® and Micro Coil Technology
    • SurfaceTouch™ Gel Memory Foam
    • Self-Response™ Latex
    • Beautyrest® Gel Support Foam
    • Sleep Climate™ Surface enhanced with cooling yarn
    King $2,359
    Compare at $3,599
    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
  • 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
    In-Store availability icon On Display:
    Estimated delivery icon Estimated free delivery to M5H 2N1 on Tue, Aug 18
    View Details
  • 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
    In-Store availability icon On Display:
    Estimated delivery icon Estimated free delivery to M5H 2N1 on Tue, Aug 18
    View Details
  • STEARNS & FOSTER® Estate® 15" Medium Firm Pillow Top Mattress
    BEST IN CLASS EXCLUSIVE OFFER LIMITED STOCK
    Stearns & Foster Estate 15-inch medium-firm pillow-top mattress, stacked blue top, navy herringbone sides Stearns & Foster Luxury Mattress Logo
    MEDIUM
    • Indulge Quilt With Silk & Wool Fibres
    • PrecisionMatch™ Memory Foam
    • PrimaSense™ Gel Infused Comfort Layers
    • Intellicoil® Innerspring (Pocket Coil)
    • Handmade By Certified Master Craftsman
    King $2,699
    Compare at $3,899
    Online availability icon Backorder Available
    In-Store availability icon On Display:
    Estimated delivery icon Estimated free delivery to M5H 2N1 on Tue, Aug 18
    View Details
  • BEAUTYREST® Centennial® 15.5" Pillow Top Plush Mattress
    EXCLUSIVE OFFER LIMITED STOCK
    Beautyrest Centennial 15.5-inch pillow top plush mattress, black sparkled pillow top with grey sides Beautyrest Centennial Luxury Mattress Logo
    PLUSH
    • 1850 T3 Triple Stranded Pocketed Coil® and Micro Coil Technology
    • SurfaceTouch™ Gel Memory Foam
    • Self-Response™ Latex
    • Beautyrest® Gel Memory Foam
    • Beautyrest® Gel Support Foam
    • Sleep Climate™ Surface enhanced with cooling yarn
    King $2,749
    Compare at $4,199
    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
  • 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
    In-Store availability icon On Display:
    Estimated delivery icon Estimated free delivery to M5H 2N1 on Tue, Aug 18
    View Details
  • STEARNS & FOSTER® Estate® 16" Plush Euro Top Mattress
    EXCLUSIVE OFFER LIMITED STOCK
    Stearns & Foster Estate 16-inch plush euro-top mattress, pillowed blue-white top, navy ribbed sides, Estate badge Stearns & Foster Luxury Mattress Logo
    PLUSH
    • Indulge Quilt With Silk & Wool Fibres
    • PrecisionMatch™ Memory Foam
    • PrimaSense™ Gel Infused Comfort Layers
    • Additional PrimaMatch™ Memory Foam
    • Intellicoil® Innerspring (Pocket Coil)
    • Handmade By Certified Master Craftsman
    King In stock for fast delivery $2,899
    Compare at $4,799
    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, Aug 3
    Pickup available icon Only Pickup available to
    M5H 2N1
    View Details
  • BEAUTYREST® Centennial® 14.5" Tight Top Medium-Firm Mattress
    EXCLUSIVE OFFER LIMITED STOCK
    Beautyrest Centennial 14.5-inch medium-firm tight-top mattress, black gold-flecked top, charcoal quilted sides Beautyrest Centennial Luxury Mattress Logo
    MEDIUM
    • 2850 T3 Triple Stranded Pocketed Coil® and Micro Coil Technology
    • SurfaceTouch™ Gel Memory Foam
    • Self-Response™ Latex
    • Micro Diamond™ Memory Foam
    • Beautyrest® Gel Comfort Foam
    • Sleep Climate™ Surface enhanced with cooling yarn
    King $2,949
    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
    View Details
  • 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 3
    Pickup available icon Only Pickup available to
    M5H 2N1
    View Details
  • 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
    View Details

Items 1-12 of 19

Showing of products

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.
Clearance Mattresses

Clearance Mattresses

Explore our discounted mattress collection, featuring limited quantities, floor models, and more.

Shop All Clearance

Mattress Selector

See which mattress is best for you!

Try Now

Thousands in Stock

We have over 1,000 mattresses in stock.

Shop Now
Loading recommendations...