Firm Medium Compatible with Adjustable Bed Adjustable Bed Compatible Mattresses Pressure Relief Mattresses Mattress Selector

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
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
Pressure relief mattresses are designed to contour to the shape of your body, cushioning the places that take the most weight — your shoulders, hips and joints — so you wake up without the aches and numbness a too-firm surface can cause. They use conforming memory foam, plush pillow-top and euro-top comfort layers, and pressure-mapping hybrids to spread your weight evenly and ease pressure points. They're especially worth a look for side sleepers, anyone with joint pain or arthritis, and lighter-weight sleepers. You'll find pressure-relieving builds across every brand — Sealy, Serta, Beautyrest, iComfort, Tempur-Pedic, Chirofoam and our own NM line — in memory foam, hybrid and plush comfort. Every mattress includes a 365-night sleep trial and free delivery across Canada. • What it does: contours to your body to ease pressure at the shoulders, hips and joints • How it works: conforming memory foam, plush pillow-top/euro-top comfort layers, pressure-mapping hybrids • Best for: side sleepers, joint pain or arthritis, and lighter-weight sleepers • The benefit: even weight distribution — fewer aches, less numbness and tossing • Builds: memory foam, hybrid and plush comfort • Related: side sleepers (position) · plush (feel) · memory foam (type) • Every order: 365-night sleep trial, price-match guarantee & free Canada-wide delivery
Firm Medium Compatible with Adjustable Bed Adjustable Bed Compatible Mattresses Pressure Relief Mattresses Mattress Selector

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Firm Medium Compatible with Adjustable Bed Compatible with Adjustable Bed Base Pressure Point Relief Clear all
  • SEALY® Posturepedic® 800 Series 11.5" Firm Tight Top Mattress
    BEST IN CLASS TOP RATED TRENDING
    Sealy Posturepedic 800 Series 11.5-inch firm tight-top mattress, tufted grey-blue speckled top, grey sides Sealy Posturepedic Mattress Logo
    FIRM
    • CleanProtect™ Fabric
    • Quilt Stay True® Quilt with MoistureProtect™ Fibres
    • CertiPUR-US™ SealySupport™ Gel HD Foam
    • Posture Touch® Pocket Coils
    • StableEdge™ HD
    • Targeted Gel HD Foam
    Single/Twin $451
    Twin XL In stock for fast delivery $507
    Double/Full $520
    Queen $588
    Compare at $1,399
    King In stock for fast delivery $849
    Online availability icon In-Stock Only 5 left!
    In-Store availability icon On Display:
    Free delivery availability icon Free delivery to M5H 2N1 as soon as Tomorrow, Aug 3
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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
    Single/Twin In stock for fast delivery $397
    Twin XL In stock for fast delivery $548
    Double/Full In stock for fast delivery $553
    Queen In stock for fast delivery $598
    Compare at $1,199
    King In stock for fast delivery $887
    Online availability icon In-Stock
    In-Store availability icon On Display:
    Free delivery availability icon Free delivery to M5H 2N1 as soon as Tomorrow, Aug 3
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  • SEALY® Posturepedic® 800 Series 13" Medium Firm Euro Top Mattress
    BEST IN CLASS TOP RATED TRENDING
    Sealy Posturepedic 800 Series 13-inch medium-firm euro-top mattress, deeply tufted grey-blue top, grey sides Sealy Posturepedic Mattress Logo
    MEDIUM
    • CleanProtect™ Fabric
    • Quilt Stay True® Quilt with MoistureProtect™ Fibres
    • CertiPUR-US™ SealySupport™ Gel HD Foam
    • Posture Touch® Pocket Coils
    • StableEdge™ HD
    • Targeted Gel HD Foam
    Single/Twin $491
    Twin XL $566
    Double/Full $575
    Queen $642
    Compare at $1,499
    King $904
    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
    Single/Twin $537
    Twin XL In stock for fast delivery $553
    Double/Full $597
    Queen In stock for fast delivery $645
    Compare at $1,599
    King $765
    Online availability icon In-Stock Only 5 left!
    In-Store availability icon On Display:
    Free delivery availability icon Free delivery to M5H 2N1 as soon as Tomorrow, Aug 3
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  • BEAUTYREST® BeautySleep® 11" Medium Firm Euro Top Mattress
    BEST IN CLASS TOP RATED TRENDING
    BEAUTYREST® BeautySleep® 11" Medium Firm Euro Top Mattress - 1 Beautyrest BeautySleep Logo
    MEDIUM
    • 815 Original Beautyrest® Pocketed Coil®
    • Gel-Infused Fibre Blend
    • AirFeel® Foam
    • Gel Foam
    • High-Density Foam Encasement
    Single/Twin $558
    Twin XL In stock for fast delivery $603
    Double/Full $612
    Queen In stock for fast delivery $652
    Compare at $1,599
    RV Short Queen $652
    King $810
    Online availability icon In-Stock Only 5 left!
    In-Store availability icon On Display:
    Free delivery availability icon Free delivery to M5H 2N1 as soon as Tomorrow, Aug 3
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  • SERTA® Perfect Sleeper® 10.5" Firm Tight Top Mattress
    CLEARANCE TOP RATED LIMITED STOCK
    Serta Perfect Sleeper 10.5-inch firm tight-top mattress, white quilted top, charcoal-navy sides Serta Perfect Sleeper Premium Mattress Logo
    FIRM
    • 825 Edition Custom Support Coil System
    • CoolFeel Fabric™
    • Gel Band Support
    • Serta® Support Foam
    • PillowSoft® Foam
    • Designed and Made in Canada
    Single/Twin SOLD OUT
    Twin XL SOLD OUT
    Double/Full SOLD OUT
    Queen SOLD OUT
    Compare at $1,399
    King SOLD OUT
    Online availability icon Out Of Stock
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  • CHIROFOAM™ 12" Luxury Firm Hybrid Mattress
    BEST IN CLASS BEST SELLING TOP RATED
    Chirofoam 12-inch luxury-firm hybrid mattress, white damask-quilted top, navy diamond-quilted sides Chirofoam Logo
    FIRM
    • Cool Gel Infused Memory Foam
    • Firm Support Chirofoam
    • Pro Lumbar Support
    • Canadian Made 1000 Hi-Loft Pocket Coils
    • 15 Year Warranty
    Single/Twin In stock for fast delivery $442
    Twin XL In stock for fast delivery $561
    Double/Full In stock for fast delivery $569
    Queen In stock for fast delivery $675
    Compare at $1,299
    King In stock for fast delivery $862
    Online availability icon In-Stock
    In-Store availability icon On Display:
    Free delivery availability icon Free delivery to M5H 2N1 as soon as Tomorrow, Aug 3
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  • SPRINGWALL® Chiropractic® 11" Firm Tight-Top Mattress
    BEST IN CLASS TOP RATED TRENDING
    Springwall Chiropractic 11-inch firm tight-top mattress, navy swirl-pattern top, darker navy sides Springwall Chiropractic Premium Mattress Logo
    FIRM
    • 1800 7-Zoned Chiropractic® Pocket Coils
    • Cold PE Technology Premium Surface Fabric
    • Graphite Gel PCM Comfort Layers
    • CoreBalance™ Support System with Micro Coils
    • HD Bio Comfort Foams
    Single/Twin In stock for fast delivery $475
    Twin XL In stock for fast delivery $624
    Double/Full In stock for fast delivery $634
    Queen In stock for fast delivery $690
    Compare at $1,499
    King In stock for fast delivery $907
    Online availability icon In-Stock
    In-Store availability icon On Display:
    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
    Single/Twin In stock for fast delivery $571
    Twin XL In stock for fast delivery $629
    Double/Full In stock for fast delivery $639
    Queen In stock for fast delivery $694
    Compare at $1,299
    King In stock for fast delivery $967
    Online availability icon In-Stock
    In-Store availability icon On Display:
    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
    Single/Twin In stock for fast delivery $505
    Twin XL In stock for fast delivery $553
    Double/Full $610
    Queen In stock for fast delivery $711
    Compare at $1,699
    King In stock for fast delivery $1,025
    Online availability icon In-Stock
    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
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  • SEALY® Posturepedic® Plus 1000 Series 11.5" Firm Tight Top Mattress
    BEST IN CLASS TOP RATED TRENDING
    Sealy Posturepedic Plus 1000 Series 11.5-inch firm tight-top mattress, white-blue tufted top, light grey sides Sealy Posturepedic Plus Mattress Logo
    FIRM
    • CleanProtect™ Cover
    • SealyAir™ Fibres
    • CertiPUR-US™ SealyComfort™ Gel HD Foam
    • SealyResponse™ HD Pocket Coils
    • StableEdge™ HD
    • PROBACK® Quilt with Targeted GelBoost™ HD Memory Foam
    Single/Twin $593
    Twin XL In stock for fast delivery $663
    Double/Full $688
    Queen $746
    Compare at $1,799
    King $988
    Online availability icon In-Stock Only 3 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
  • SPRINGWALL® Chiropractic® 12" Firm Hybrid Mattress
    BEST IN CLASS BEST SELLING TRENDING
    Springwall Chiropractic 12-inch firm hybrid mattress, navy swirl-pattern top, banded navy sides Springwall Chiropractic Premium Mattress Logo
    FIRM
    • 1800 7-Zoned Chiropractic® Pocket Coils
    • Cold PE Technology Premium Surface Fabric
    • Graphite Gel PCM Comfort Layers
    • CoreBalance™ Support System with Micro Coils
    • HD Bio Comfort Foams
    Single/Twin In stock for fast delivery $530
    Twin XL In stock for fast delivery $674
    Double/Full In stock for fast delivery $685
    Queen In stock for fast delivery $750
    Compare at $1,599
    King In stock for fast delivery $972
    Online availability icon In-Stock
    In-Store availability icon On Display:
    Free delivery availability icon Free delivery to M5H 2N1 as soon as Tomorrow, Aug 3
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Items 25-36 of 100

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Upgrade your sleep at National Mattress

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Why Choose Us?

  • Variety: From plush to firm, we have options for every body type and sleep style.
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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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