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Firm Medium Sealy® Springwall® MLILY® Compatible with Adjustable Bed Adjustable Bed Base Friendly All

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
Sealy mattresses are engineered for dependable, body-aligning support — many featuring Posturepedic Technology that reinforces the centre third where you need it most. Compare every option below by feel, size, and price.
Springwall is a proudly Canadian-made brand known for chiropractic-minded support and durable, value-driven construction. Compare every option below by feel, size, and price.
MLILY® is a global sleep brand known for memory-foam comfort and modern hybrid design, made in the USA. From the cooling PowerCool and the pocket-coil Midnight and ChiroPro hybrids to the all-foam WellFlex and the officially licensed Manchester United collection, MLILY pairs AeroFusion™ foams with individually pocketed coils for supportive, motion-isolating sleep. Backed by warranties up to 10 years and free next-day delivery in Toronto.
Shop adjustable base friendly mattresses from Beautyrest, Serta, Sealy, Tempur-Pedic, Springwall, iComfort, and Stearns & Foster at National Mattress — 169+ models in memory foam, hybrid, latex, eurotop, and tight-top constructions from $59 to $6,640. Every mattress in this collection is manufacturer-verified to flex and articulate with an adjustable base without voiding the warranty. Available in Twin through King sizes with firmness levels from extra firm to plush, all built with CertiPUR-US® certified foams, including Canadian-made options. Free delivery is available, along with a 365-night sleep trial and 5–15 year warranty coverage.
Firm Medium Sealy® Springwall® MLILY® Compatible with Adjustable Bed Adjustable Bed Base Friendly All
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  • MLILY® ChiroPro 1.0 13" Firm Hybrid Mattress - 1 MLILY® ChiroPro collection logo
    • 3-Zone Individually Pocketed Spring System
    • Knit Cover with ContourFit Design
    • Gel AeroFusion® Memory Foam
    • Gentle Flex Foam
    • 10 Year Warranty
    Single/Twin $2,299
    Twin XL In stock for fast delivery $2,299
    Double/Full $2,599
    Queen $2,899
    Compare at $3,199
    King In stock for fast delivery $3,399
    Online availability icon In-Stock Only 8 left!
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  • MLILY Manchester United Dream 12" Memory Foam Mattress, white top with black-and-red sides and crest tag MLILY® Manchester United collection logo
    • Bamboo Charcoal AeroFusion™ Memory Foam
    • AdaptiFoam™ Comfort Layer
    • Flex Support Base Foam
    • Breathable Tencel® Cover
    • 10 Year Warranty
    Single/Twin $799
    Twin XL $859
    Double/Full $1,039
    Queen In stock for fast delivery $1,199
    Compare at $2,199
    King $1,459
    Online availability icon In-Stock Only 6 left!
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  • MLILY® Midnight 1.0 12" Firm Hybrid Mattress - 1 MLILY® Midnight collection logo
    • Individually Pocketed Spring System
    • Patterned Knit Cover
    • Copper Gel AeroFusion® Memory Foam
    • Gentle Flex Foam
    • 10 Year Warranty
    Single/Twin $2,599
    Twin XL In stock for fast delivery $2,599
    Double/Full $2,899
    Queen In stock for fast delivery $3,199
    Compare at $3,599
    King In stock for fast delivery $3,699
    Online availability icon In-Stock Only 9 left!
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  • MLILY® Midnight 3.0 12" Plush Hybrid Mattress - 1 MLILY® Midnight collection logo
    • Individually Pocketed Spring System
    • Patterned Knit Cover
    • Copper Gel AeroFusion® Memory Foam
    • Latex-Like AdaptiFoam®
    • Liquid Gel CoolFlex™ Foam
    • 10 Year Warranty
    Single/Twin $2,599
    Twin XL In stock for fast delivery $2,599
    Double/Full $2,899
    Queen $3,199
    Compare at $3,599
    King In stock for fast delivery $3,699
    Online availability icon In-Stock Only 8 left!
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  • MLILY® Midnight Ice 1.0 14" Firm Hybrid Mattress - 1 MLILY® Midnight collection logo
    • Individually Pocketed Spring System
    • Cooling Knit Cover with PCM
    • Copper Gel AeroFusion® Memory Foam with ActiveTemp™ PCM
    • Gel AeroFusion® Memory Foam
    • 10 Year Warranty
    Twin XL In stock for fast delivery $3,099
    Queen $3,699
    Compare at $4,099
    King In stock for fast delivery $4,199
    Online availability icon In-Stock Only 8 left!
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  • MLILY WellFlex 3.0 12" Plush Memory Foam Mattress, blue-tabbed white top, wave-embossed cover over charcoal base MLILY® WellFlex collection logo
    • Gel AeroFusion® Memory Foam
    • BioBreeze™ Memory Foam
    • Liquid Gel CoolFlex™ Foam
    • Cooling Organic Knit Cover
    • Flex Support Base Foam
    • 10 Year Warranty
    Single/Twin $1,899
    Twin XL In stock for fast delivery $1,899
    Double/Full $2,199
    Queen $2,499
    Compare at $2,799
    King $2,999
    Online availability icon In-Stock Only 7 left!
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  • MLILY WellFlex Ice 1.0 14" Firm Memory Foam Mattress, smooth white top with blue wave pattern, dark charcoal border MLILY® WellFlex collection logo
    • Gel AeroFusion® Memory Foam with ActiveTemp™ PCM
    • BioBreeze™ Memory Foam
    • Performance Memory Foam
    • Cooling Organic Knit Cover with PCM
    • Flex Support Base Foam
    • 10 Year Warranty
    Twin XL In stock for fast delivery $2,399
    Queen $2,999
    Compare at $3,299
    King $3,499
    Online availability icon In-Stock Only 7 left!
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  • Sealy Essentials 10.5-inch medium-firm euro-top foam mattress, blue-speckled top, white sides on black base Sealy Essentials Mattress Logo
    • CleanProtect™ Fabric
    • SealyLoft™ Quilt with Moisture Wicking Fibres
    • CertiPUR-US™ SealySupport™ HD Foam
    • CertiPUR-US™ SealySupport™ HD Core
    • SealySupport™ HD Foam
    Single/Twin $432
    Twin XL In stock for fast delivery $478
    Double/Full $486
    Queen $505
    Compare at $1,199
    King $655
    Online availability icon In-Stock Only 3 left!
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  • Sealy Essentials 11-inch medium-firm tight-top mattress, blue-speckled flat top, white pinstriped sides Sealy Essentials Mattress Logo
    • CleanProtect™ Fabric
    • SealyLoft™ Quilt with Moisture Wicking Fibres
    • CertiPUR-US™ SealySupport™ HD Foam
    • Posture Touch® Pocket Coils
    • EssentialEdge™ Coil Support
    Single/Twin In stock for fast delivery $409
    Twin XL In stock for fast delivery $423
    Double/Full $462
    Queen $505
    Compare at $1,199
    King $675
    Online availability icon In-Stock Only 2 left!
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  • Sealy Natural Origins 13.5-inch firm tight-top latex mattress, flat tufted white top, grey-black diamond sides Sealy Natural Origins Mattress Logo
    • OEKO-TEX Certified BioGel Latex
    • SealyCool Fibres with Silk & Wool
    • Organic Cotton Infused with Bamboo
    • Targeted ComfortSense Memory Foam
    • SealySupport HD Core
    • CertiPUR-US® Approved Foam
    Single/Twin In stock for fast delivery $890
    Twin XL In stock for fast delivery $926
    Double/Full $940
    Queen In stock for fast delivery $998
    Compare at $2,399
    King $1,322
    Online availability icon In-Stock Only 8 left!
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  • Sealy Cocoon 10-inch firm memory foam mattress, white pebbled knit top, black Cocoon side band Sealy Cocoon Memory Foam Mattress Logo
    • Premium Fabric Cover
    • Perfect Fit Memory Foam
    • Personalized Comfort Layer
    • Essential Support Foam
    • 10 Year Warranty
    Twin XL $759
    Double/Full In stock for fast delivery $609
    Queen In stock for fast delivery $779
    Compare at $2,199
    King $1,273
    Online availability icon In-Stock Only 4 left!
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  • Sealy Cocoon 8-inch medium-firm memory foam mattress, white swirl-pattern top, black sides, Cocoon logo Sealy Cocoon Memory Foam Mattress Logo
    • 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 $599
    Compare at $1,699
    King In stock for fast delivery $759
    Online availability icon In-Stock Only 7 left!
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