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Medium Hypoallergenic Mattresses All 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
Hypoallergenic mattresses are made to resist the things that trigger allergies and disrupt sleep — dust mites, mould, mildew and bacteria — using antimicrobial and naturally resistant cover materials like bamboo and Tencel, plus CertiPUR-US® certified, low-VOC foams. The result is a cleaner, fresher sleep surface that's gentler on sensitive skin and easier on allergy and asthma sufferers. You'll find hypoallergenic builds across brands like Sealy, Serta, Beautyrest, iComfort, Springwall, Evergreen and our own NM line, in foam, hybrid and pocket-coil. If allergies or sensitivities affect your sleep, start here. Every mattress includes a 365-night sleep trial and free delivery across Canada. • What it means: built to resist dust mites, mould, mildew and bacteria • How it works: antimicrobial and naturally resistant covers (bamboo, Tencel) plus CertiPUR-US®, low-VOC foams • Best for: allergy and asthma sufferers, sensitive skin, and anyone who wants a cleaner sleep surface • The benefit: fewer allergens, a fresher feel, gentler on sensitivities • Across brands and builds: foam, hybrid and pocket-coil • Every order: 365-night sleep trial, price-match guarantee & free Canada-wide delivery

Shop a wide range of mattresses from Serta, Beautyrest, Sealy, Tempur-Pedic, Springwall, and Stearns & Foster at National Mattress, available in Single/Twin through King sizes, from budget-friendly to luxury. Choose from innerspring, euro-top, memory foam, hybrid, and latex constructions in four firmness levels from extra firm to plush. Every mattress is manufactured in Canadian factories using CertiPUR-US® certified foams and ships free across Canada with a 365-night sleep trial, price match guarantee, and coverage under the manufacturer warranty terms.

Medium Hypoallergenic Mattresses All Mattresses
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  • NM® Cozy Air™ 8" Medium Firm Memory Foam Mattress - 1 NM Cozy Collection Logo
    • 7″ High Density Foam Core
    • 1″ Cool Gel Memory Foam
    • 3D Air-Knit Performance Fabric
    • Foam Core, No Coils
    • Mattress In A Box
    • CertiPUR-US Certified Foams
    • 10 Year Warranty
    • Made In Canada
    Single/Twin In stock for fast delivery $320
    Twin XL In stock for fast delivery $374
    Double/Full In stock for fast delivery $380
    Queen In stock for fast delivery $419
    Compare at $899
    King In stock for fast delivery $602
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  • NM Cozy 8" Medium Firm Memory Foam Mattress
    CLEARANCE FLASH SALE BEST IN CLASS
    National Mattress 8-inch medium-firm memory-foam mattress, smooth white tight-top, charcoal sides, NM badge NM Cozy Collection Logo
    • High Density Foam Core
    • Cool Gel Memory Foam
    • Hypoallergenic Bamboo Cover
    • 10 Year Warranty
    • Made In Toronto, Canada
    Single/Twin SOLD OUT
    Twin XL In stock for fast delivery $359
    Double/Full In stock for fast delivery $359
    Queen SOLD OUT
    Compare at $899
    King In stock for fast delivery $576
    Online availability icon In-Stock Only 8 left!
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  • EVERGREEN ecoRest 12" Medium Firm Certified Organic Latex Mattress, cream damask-quilted cotton cover, angled Evergreen Sleep Organic Latex Mattress Collection Logo
    • Organic Latex
    • Cool Gel Foam
    • Organic Cotton Fabric
    • High Loft Pocket Coil
    Single/Twin SOLD OUT
    Twin XL In stock for fast delivery $548
    Double/Full SOLD OUT
    Queen SOLD OUT
    Compare at $1,199
    King SOLD OUT
    Online availability icon In-Stock Only 2 left!
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  • NM® Cozy Air™ 12" Medium Firm Memory Foam Mattress - 1 NM Cozy Collection Logo
    • 8″ High Density Foam Core
    • 2.5″ Cool Gel Memory Foam
    • 2″ Soft Foam
    • 3D Air-Knit Performance Fabric
    • Medium Firm 6/10 Feel · 12″ Profile
    • CertiPUR-US® Certified, Fiberglass Free
    • 10 Year Warranty
    • Made In Canada
    Single/Twin In stock for fast delivery $480
    Twin XL In stock for fast delivery $536
    Double/Full In stock for fast delivery $545
    Queen In stock for fast delivery $586
    Compare at $1,299
    King In stock for fast delivery $774
    Online availability icon In-Stock Only 8 left!
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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 In stock for fast delivery $548
    Double/Full In stock for fast delivery $556
    Queen In stock for fast delivery $645
    Compare at $1,199
    King In stock for fast delivery $840
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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
    • Optimal High Resilient Bio-Foam Core
    • Gel Infused Visco Memory Foam
    • Cotton Channel Quilted Cover
    • 10 Year Warranty
    • Made In Toronto, Canada
    Single/Twin $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 $819
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  • Evergreen 12-inch medium-firm organic latex foam mattress, white button-tufted top, ribbed sides, sage trim Evergreen Sleep Organic Latex Mattress Collection Logo
    • Open Cell Bio Foam Core
    • 4" Organic Latex Comfort Layer
    • 1" Organic Latex Support Panel
    • Organic Cotton Quilt
    • 10 Year Warranty
    • Made In Toronto, Canada
    Single/Twin In stock for fast delivery $1,011
    Twin XL In stock for fast delivery $1,027
    Double/Full In stock for fast delivery $1,043
    Queen In stock for fast delivery $1,167
    Compare at $2,099
    King $1,575
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  • 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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  • Beautyrest Quintessence 18-inch medium firm super pillow-top mattress, grey damask tufted 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 $3,899
    Online availability icon Out Of Stock
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  • Evergreen 100% organic 10-inch medium-firm latex mattress, white diamond-quilted top, brown base trim Evergreen Sleep Pure 100% Organic Latex Mattress Collection Logo
    • 100% Certified Natural Organic Latex
    • Global Organic Latex Standard – Certified 100% Natural
    • Eco-Institute – No Fillers or Hazardous Particles
    • Oeko-Tex Standard 100 – No Harmful Substances
    • ABC Research Laboratories – Certified Antimicrobial
    Single/Twin In stock for fast delivery $1,169
    Twin XL In stock for fast delivery $1,877
    Double/Full In stock for fast delivery $1,619
    Queen In stock for fast delivery $1,935
    Compare at $3,599
    King In stock for fast delivery $2,249
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10 Items

How to Choose a Mattress

Choosing a mattress comes down to three decisions: what holds you up, how firm it feels, and what size fits your room and the people in the bed. Everything else follows from those. The support layer underneath determines how the bed behaves over years of use, while the comfort layers on top decide how it feels on the first night, and the two are worth judging separately. National Mattress carries innerspring, hybrid, memory foam and latex construction from Sealy, Serta, Beautyrest, Stearns & Foster, Tempur-Pedic, MLILY, Chirofoam, Springwall, Marshall Mattress, Evergreen and our own NM line.

Firmness is a fit rather than a quality rating. Side sleepers usually want medium or plush, so the shoulder and hip can sink far enough to keep the spine straight. Back sleepers usually want medium to firm, which fills the lumbar curve. Stomach sleepers want the firm end, so the hips are not allowed to drop below the ribs, and extra firm belongs there and to heavier sleepers. If you share the bed and your answers differ, a pocketed coil support system limits how much of your movement reaches the other side, and choosing a larger size does more for a shared bed than any single feature. Firmness on our mattresses runs extra firm, firm, medium and plush.

🛏 Coil, Foam, Hybrid or Latex

In a pocket coil bed each spring sits in its own fabric pocket and compresses on its own, so far less of your movement reaches the other side. A connected coil unit links the springs together for a firmer, more uniform surface at a lower price. All-foam beds contour closely and make no noise. Latex is springier than memory foam and does not hold heat the same way.

💤 Firmness by Sleep Position

Side sleepers need the surface to give at the shoulder and hip. Back sleepers want medium to firm, enough to fill the lumbar curve without flattening it. Stomach sleepers want the firm end, which keeps the hips level with the ribs. If you move between positions all night, medium is the safest place to start. Body weight shifts this too: a heavier sleeper compresses any comfort layer further and generally reads a mattress as softer than a lighter sleeper does.

👥 Sharing the Bed

Two things decide whether a shared bed works: motion transfer and edge support. Pocketed coils and a foam-encased perimeter mean far less of your movement reaches the other side, and they keep the outer few inches usable rather than collapsing when you sit on them. If one of you sleeps hot, that is a materials question, and it is worth solving on the comfort layer rather than compromising on firmness.

📏 Get the Size Right First

Size is the one decision you cannot adjust later with a topper. Measure the room, then measure the route in: stairwell turns, doorways and elevator depth are what actually stop a delivery. A queen suits most couples, a king buys shoulder room, and twin XL is the length growing teenagers and taller single sleepers need.

Frequently Asked Questions About Choosing a Mattress

How do I know which firmness I need?
Start from the position you fall asleep in. Side sleepers generally do best on medium or plush, because the shoulder and hip need somewhere to go before the spine can stay neutral. Back sleepers generally do best on medium to firm, which fills the lumbar curve. Stomach sleepers want the firm end, which stops the hips sinking below the ribs. Combination sleepers should start at medium. Your body weight matters as well, since a heavier sleeper reads the same mattress as softer than a lighter one does.
What is the difference between pocket coils and a connected coil unit?
In a pocket coil mattress every spring sits in its own fabric pocket and compresses independently, so far less of one sleeper's movement reaches the other side. A connected coil unit links the springs together instead, and that is a family: Bonnell laces separate hourglass coils with helical wire, and only a continuous unit is bent from a single strand. That makes for a firm, uniform, durable surface and usually a lower price, but more of any movement travels across the bed.
Is a hybrid better than an all-foam mattress?
Neither is better outright, they fail differently. A hybrid puts foam or latex comfort layers over a coil support core, so it gives you contouring with more bounce, stronger edges and more airflow through the middle of the bed. An all-foam mattress contours more closely, isolates motion almost completely and is silent, but it warms up more, and gel or graphite infusion only slows the warm-up; sustained cooling comes from airflow. Hot sleepers and people who dislike a sinking feeling usually prefer a hybrid.
How long should a mattress last before I replace it?
Watch the mattress rather than the calendar. The signals that matter are a visible dip where you sleep, waking with stiffness that eases once you are up, or sleeping noticeably better away from home. Construction changes the answer a good deal, since a dense foam core and a pocket coil unit age differently from an entry-level foam bed. Our guide to mattress lifespan by type sets out what to expect from each.
Do I need a new boxspring or foundation as well?
Usually yes if the old one is sagging, because a mattress can only be as flat as what it sits on, and a dip underneath will show through a new mattress within months. Foam and hybrid mattresses want a solid or closely slatted platform, and slats spaced too widely let the mattress bow between them. If you are considering an adjustable base instead, the mattress has to be able to flex, which not every construction can do.
Which mattress size should I buy?
Work backwards from the room and the sleepers. A queen is the usual choice for two adults and fits most bedrooms with space to walk around the bed. A king adds width for couples who want to move without touching, and a split king lets each side sit on its own adjustable base. Twin XL adds length for taller sleepers. Our guide to standard Canadian mattress sizes lists the measurements.

Not Sure Where to Start?

Answer a few questions about how you sleep and we will narrow the field for you, or talk it through with someone whose pay does not depend on which mattress you choose. Our non-commissioned sleep experts can put two beds side by side and tell you what actually separates them.

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