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Medium Traditional Adjustable Bed Base Friendly Breathable Mattresses All

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
Traditional mattresses have a tight-top surface — the comfort layers are smoothly upholstered into the mattress with no added pillow-top or euro-top. That means a firmer, more supportive and responsive feel, excellent durability, and a clean classic look without the "sink" of a plush topper. Compare every tight-top option below by brand, feel, and price.
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.
Breathable mattresses are built to move air, not trap it. Through ventilated and open-cell foams, breathable knit and Tencel covers, and pocket-coil airflow, they let heat and moisture escape instead of building up under you — so your sleep surface stays fresher, drier and more comfortable through the night. It's a great fit if you sweat at night, live in a humid climate, or just don't like that stuffy, sunk-in feel. You'll find breathable builds across every brand — Sealy, Serta, Beautyrest, iComfort, Tempur-Pedic, Chirofoam and our own NM line — in foam, hybrid and pocket-coil. Sleep especially hot? See our cooling mattresses for active heat-wicking. Every mattress includes a 365-night sleep trial and free delivery across Canada. • What it means: airflow-focused builds that let heat and moisture escape instead of trapping them • How it works: ventilated/open-cell foams, breathable knit & Tencel covers, pocket-coil airflow • The benefit: a fresher, drier, less stuffy sleep surface • Best for: sweaty sleepers, humid climates, or anyone who dislikes a sunk-in, stuffy feel • Sleep hot? See cooling mattresses; want a steady temp? See temperature-regulating • Across every brand and firmness • Every order: 365-night sleep trial, price-match guarantee & free Canada-wide delivery
Medium Traditional Adjustable Bed Base Friendly Breathable Mattresses All
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  • Beautyrest Centennial 13.5-inch tight top medium-firm mattress, black sparkled top with grey sides Beautyrest Centennial Luxury Mattress Logo
    • 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
    Single/Twin In stock for fast delivery $2,259
    Twin XL $2,289
    Double/Full $2,289
    Queen $2,339
    Compare at $3,299
    King $2,529
    Online availability icon In-Stock Only 1 left!
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  • Beautyrest World Class 12.5-inch hybrid medium-firm mattress, angled view with blue chevron top and blue trim Beautyrest World Class Mattress Collection Logo
    • 1000 Beautyrest® Pocketed Coil Technology
    • Beautyrest® ActiveResponse Memory Foam
    • Beautyrest® Medium Gel Foam
    • World Class Relief™ HD Foam
    • InfiniCool™ Technology
    Twin XL $1,125
    Double/Full $1,142
    Queen $1,196
    Compare at $2,899
    King In stock for fast delivery $1,363
    Online availability icon In-Stock Only 1 left!
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  • Beautyrest World Class 13.5-inch medium-firm hybrid mattress, teal chevron tight-top, grey sides, maroon badge Beautyrest World Class Mattress Collection Logo
    • 1000 Beautyrest® Pocketed Coil Technology
    • Beautyrest® ActiveResponse Memory Foam
    • Beautyrest® Firm Gel Foam
    • 2X World Class Relief™ HD Foam
    • InfiniCool™ Technology
    Twin XL $1,275
    Double/Full $1,294
    Queen $1,351
    Compare at $3,199
    King $1,513
    Online availability icon Backorder Available
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    Estimated delivery icon Estimated free delivery to M5H 2N1 as soon as Sun, Oct 18
  • Beautyrest World Class 13-inch medium-firm tight-top mattress, teal quilted top, charcoal sides with magenta piping Beautyrest World Class Mattress Collection Logo
    • 1000 Beautyrest® Pocketed Coil Technology
    • Beautyrest® ActiveResponse Memory Foam
    • SurfaceTouch™ Gel Memory Foam
    • World Class Relief™ HD Foam
    • InfiniCool™ MAX Technology
    • Beautyrest® Natural Lux Fibre Technology
    Single/Twin In stock for fast delivery $1,142
    Twin XL $1,196
    Double/Full $1,214
    Queen $1,270
    Compare at $2,999
    King $1,438
    Online availability icon In-Stock Only 1 left!
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  • BEAUTYREST® BeautySleep® 12.5" Medium Firm Pillow Top Mattress - 1 Beautyrest BeautySleep Logo
    • 815 Original Beautyrest® Pocketed Coil®
    • Gel-Infused Fibre Blend
    • AirFeel® Foam
    • Gel Foam + Gel Memory Foam
    • High-Density Foam Encasement
    Single/Twin $692
    Twin XL $738
    Double/Full $750
    RV Short Queen $791
    Queen $791
    Compare at $1,899
    King $959
    Online availability icon Backorder Available
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    Estimated delivery icon Estimated free delivery to M5H 2N1 as soon as Sun, Oct 18
  • Beautyrest Centennial 14.5-inch medium-firm tight-top mattress, black gold-flecked top, charcoal quilted sides Beautyrest Centennial Luxury Mattress Logo
    • 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
    Single/Twin In stock for fast delivery $2,879
    Twin XL $2,909
    Double/Full $2,909
    Queen In stock for fast delivery $2,209
    Compare at $4,199
    King $3,159
    Online availability icon In-Stock Only 4 left!
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  • Beautyrest 13-inch medium-firm tight-top mattress, flat grey ribbed quilting with teal accents Beautyrest Mattress Collection Logo
    • 875 Beautyrest® Pocketed Coil Technology
    • Beautyrest® ActiveResponse Memory Foam
    • SurfaceTouch™ Gel Memory Foam
    • Beautyrest® Plush Gel Foam
    • InfiniCool™ Technology
    • Beautyrest® Antimicrobial Fibre Technology
    Single/Twin $769
    Twin XL $817
    Double/Full $830
    Queen $879
    Compare at $2,099
    King $1,034
    Online availability icon Backorder Available
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    Estimated delivery icon Estimated free delivery to M5H 2N1 as soon as Sun, Oct 18
  • Beautyrest Quintessence 14.5-inch medium firm tight-top mattress, flat grey damask top, herringbone side Beautyrest Quintessence Mattress Collection Logo
    • Beautyrest® T3 Pocketed Coil Technology
    • Beautyrest® Gel Memory Foam
    • WinterCool™ Carbon Foam and GelTouch® Foam
    • WinterCool™ Tri-Fiber with alpaca, cashmere, and silk.
    • WinterCool™ Sleep System with 4 distinct cooling technologies.
    • WinterCool™ Carbon Foam and GelTouch® Foam
    Queen SOLD OUT
    Compare at $3,499
    King SOLD OUT
    Online availability icon Out Of Stock
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  • Evergreen 12-inch tight-top medium-firm organic latex mattress, white button-tufted top, sage piped border Evergreen Sleep Organic Latex Mattress Collection Logo
    • 1000 Hi-Loft Pocket Coil with Foam Encased Perimeter
    • Organic Latex Comfort Layer
    • Bio-Foam natural foam content support layers
    • Organic Cotton Quilt with Organic Latex and Organic Wool
    • 10 Year Warranty
    • Made In Toronto, Canada
    Single/Twin In stock for fast delivery $402
    Twin XL $548
    Double/Full $556
    Queen $645
    Compare at $1,199
    King $840
    Online availability icon In-Stock Only 4 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 $1,199
    Compare at $2,199
    King $1,459
    Online availability icon Backorder Available
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    Estimated delivery icon Estimated free delivery to M5H 2N1 as soon as Thu, Oct 15
  • MLILY® PowerCool 11.5" Medium Hybrid Mattress - 1 MLILY® PowerCool collection logo
    • Individually Pocketed Spring System
    • Fully Ventilated Cooling Cover
    • Ventilated Latex-Like AdaptiFoam®
    • Ventilated Bamboo Charcoal Memory Foam
    • 10 Year Warranty
    Twin XL SOLD OUT
    Queen SOLD OUT
    Compare at $3,399
    King SOLD OUT
    Online availability icon Out Of Stock
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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 $1,899
    Double/Full $2,199
    Queen $2,499
    Compare at $2,799
    King $2,999
    Online availability icon Backorder Available
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    Estimated delivery icon Estimated free delivery to M5H 2N1 as soon as Thu, Oct 15

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