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NM® HD+™ Core Edge Support Mattresses Compatible with Adjustable Bed Adjustable Bed Compatible Mattresses Mattress Selector: Find Your Match in a Few Questions

Meet NM® HD+™ Core—mattresses built around high‑density foam for durable support, low motion transfer for quieter nights, zoned lumbar for alignment, and reinforced edges for full‑width comfort. Available in firm, medium, and plush feels across Twin, Twin XL, Full/Double, Queen, and King.
Edge support mattresses are reinforced around the perimeter so the edge feels as solid as the middle — you can sleep right up to the side without that sinking, roll-off feeling, sit on the edge to get dressed without it caving, and use the full surface of the bed. It's a feature that matters most for couples sharing the space, anyone who sits on the edge to get in and out of bed, and heavier-weight sleepers. These are mostly our pocket-coil and hybrid mattresses with full-perimeter coils or foam-encased edges — from Springwall (Full Perimeter Comfort Pockets), Sealy, Serta, Beautyrest, iComfort, Stearns & Foster and our own NM line. Every mattress includes a 365-night sleep trial and free delivery across Canada. • What it does: a reinforced perimeter so the edge stays firm — no sinking or rolling off • Why it matters: more usable sleep surface, easier to sit on the edge and get in and out of bed • Best for: couples sharing space, anyone who sits on the edge, and heavier-weight sleepers • How it works: full-perimeter pocket coils or foam-encased edges (mostly coil & hybrid; all-foam edges are softer) • Brands: Springwall (Full Perimeter Comfort Pockets), Sealy, Serta, Beautyrest, iComfort, Stearns & Foster & NM • Every order: 365-night sleep trial, price-match guarantee & free Canada-wide delivery
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

Answer a short set of questions — who the bed is for, your sleep position, your body type, where you ache, how hot you sleep, the feel you prefer, whether you want a pillow top, and your budget — and the selector narrows 167 mattresses down to a shortlist. It draws on the full range stocked here: Beautyrest (38 models), Serta (27), Sealy (24), Springwall (23), NM (17), Serta iComfort (16), Tempur-Pedic (8), Stearns & Foster (6), Evergreen (4) and Chirofoam (4).

Feel is the answer worth getting right, and there is real choice at every point on the scale: across these 167 mattresses there are 59 firm builds, 47 plush, 44 medium and 15 extra firm. Budget is optional — leave it blank and you will still see a range. Whatever the selector suggests, you can lie on the result at any of our seven Ontario showrooms, and every mattress here carries a 365-night sleep trial, which is the part that actually protects you if the shortlist is wrong.

NM® HD+™ Core Edge Support Mattresses Compatible with Adjustable Bed Adjustable Bed Compatible Mattresses Mattress Selector
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  • National Mattress HD 6-inch extra-firm foam mattress, grey damask tight-top, charcoal sides, Canada-flag badge NM Logo
    • High Density Foam Core
    • High Density Foam Comfort Layer
    • Cotton Support Quilt
    • 5 Year Warranty
    • Made In Canada
    Single/Twin $152
    Twin XL In stock for fast delivery $203
    Double/Full In stock for fast delivery $206
    Queen In stock for fast delivery $251
    Compare at $499
    King In stock for fast delivery $328
    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 28
    Pickup available icon Only Pickup available to
    M5H 2N1
  • National Mattress 6-inch firm tight-top foam mattress, slim white diamond-quilted cover, charcoal piping NM Logo
    • High Density Foam Core
    • High Density Foam Comfort Layer
    • Cotton Channel Quilted Cover
    • 5 Year Warranty
    • Made In Toronto, Canada
    Single/Twin In stock for fast delivery $177
    Twin XL In stock for fast delivery $238
    Double/Full In stock for fast delivery $243
    Queen In stock for fast delivery $260
    Compare at $599
    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 28
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    M5H 2N1
  • National Mattress 8-inch medium-firm euro-top foam mattress, white diamond-quilted top, charcoal piping NM Logo
    • High Density Foam Core
    • High Resilience Comfort Foam
    • Soft Luxurious Cotton Cover
    • 5 Year Warranty
    • Made In Toronto, Canada
    Single/Twin In stock for fast delivery $229
    Twin XL In stock for fast delivery $288
    Double/Full In stock for fast delivery $312
    Queen In stock for fast delivery $338
    Compare at $699
    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 28
    Pickup available icon Only Pickup available to
    M5H 2N1
  • National Mattress HD 8-inch extra-firm foam mattress, white diamond-quilted tight-top, black quilted sides NM Logo
    • Extra-Firm High Density Foam Core
    • HD Foam Support Layer
    • Cotton Fabric Quilted Top
    • 25 Year Warranty
    • Made In Toronto, Canada
    Single/Twin $256
    Twin XL In stock for fast delivery $356
    Double/Full In stock for fast delivery $361
    Queen In stock for fast delivery $439
    Compare at $799
    King In stock for fast delivery $564
    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 28
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    M5H 2N1
  • National Mattress HD 10-inch extra-firm flippable foam mattress, white quilted top with charcoal sides NM Logo
    • HD+™ High Density Foam Core
    • Firm BioComfort™ Foam
    • Dual Sided Cotton Support Quilt
    • 25 Year Warranty
    • Made In Canada
    Single/Twin In stock for fast delivery $496
    Twin XL In stock for fast delivery $528
    Double/Full In stock for fast delivery $545
    Queen $586
    Compare at $1,299
    King In stock for fast delivery $759
    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 28
    Pickup available icon Only Pickup available to
    M5H 2N1
  • National Mattress HD 13-inch extra-firm pillow-top foam mattress, tall black quilted sides, white diamond top NM Logo
    • Extra-Firm High Density Foam Core
    • High-Density Foam Support Layers
    • Bamboo Quilted Top
    • 25 Year Warranty
    • Made In Toronto, Canada
    Single/Twin In stock for fast delivery $416
    Twin XL In stock for fast delivery $569
    Double/Full In stock for fast delivery $578
    Queen In stock for fast delivery $695
    Compare at $1,299
    King $906
    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 28
    Pickup available icon Only Pickup available to
    M5H 2N1

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How the mattress selector works

The selector is a filter, not an oracle. It asks the questions a good salesperson asks in the first two minutes and uses your answers to narrow 167 mattresses down to a shortlist. It cannot know the things nobody could know from a form — how a bed feels to you after twenty minutes on it, or after three weeks — so treat the result as a starting point rather than a verdict.

What it asks, and why each answer matters

Who the bed is for. A guest room, a growing child and a primary bed for two adults are three different problems, and the sensible answer changes with each.

Sleep position. Side sleepers generally need more give at the shoulder and hip; back and stomach sleepers generally want less sink so the spine stays neutral. It is the single most useful thing to know about how somebody sleeps.

Body type. Weight changes how deeply any given mattress compresses, which is why two people can lie on the same bed and honestly describe it as soft and firm. A build that reads medium at one weight reads plush at another.

Where you ache. Lower-back complaints often trace to a bed too soft to hold the spine neutral; shoulder and hip complaints often trace to one too firm to let them settle in. The direction of the fix depends on where it hurts.

How hot you sleep. Coil and hybrid constructions move air better than dense all-foam ones. Memory foam contours closely and insulates while it does it — a genuine trade-off, not a defect.

Preferred feel. Worth answering honestly rather than aspirationally. If you have slept well on firm beds your whole life, say firm.

Pillow top or not, and budget. Both shape the shortlist. Budget is explicitly optional — it helps with ordering rather than acting as a hard cut-off, and you will always be shown a range.

Questions people ask about the selector

Is the mattress quiz accurate? It is accurate about what it can measure and silent about the rest. It narrows the field using what you told it about position, body type and feel. It cannot tell you which of three well-matched mattresses you will personally love — only lying on them can, which is what the showrooms and the 365-night trial are for.

Do I have to use it? No. If you already know you want a plush queen hybrid, filter for it directly or call and describe it. The selector exists for the much more common case of not knowing where to start.

Will it steer me toward expensive mattresses? Nobody here earns more for selling you a dearer bed — our staff are not paid commission. What is true is that better-built mattresses tend to cost more, so a shortlist weighted toward quality can skew upward. If that happens, set a budget and run it again, or sort the results by price and work from the other end.

What if the result is wrong? Then it is wrong, and the 365-night sleep trial is how you fix it. A mattress needs a few weeks to break in and your body needs a few weeks to adjust, so any trial short enough to expire before that has happened is not much of a trial.

Prefer to talk to a person?

The selector is a shortcut, not a requirement. Call 1-800-631-4883, email support@nationalmattress.ca, or visit any of our seven Ontario showrooms and tell someone how you sleep. Our sleep experts do the same narrowing by hand, ask better follow-up questions than any form can, and earn exactly the same whether you buy the cheapest mattress on the floor, the most expensive one, or nothing at all today.

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