NM® HD+™ Core Mattress Collection — High‑Density Foam, Zoned Lumbar & Edge Support Compatible with Adjustable Bed Adjustable Bed Compatible Mattresses White Mattresses Beige-Tone Mattresses Mattress Selector

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.
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

Most of our mattresses come in a clean, neutral white or off-white cover — and since that cover sits under your sheets, colour won't change how you sleep. To find the right bed, shop by what actually matters: your size (twin to king), your comfort level (plush, medium, firm), or your preferred type (memory foam, hybrid, pocket coil). Every mattress includes a 365-night sleep trial and free delivery across Canada.


These mattresses feature a beige or neutral-tone cover — and since that cover sits under your sheets, colour won't change how you sleep. To find the right bed, shop by size (twin to king), comfort (plush, medium, firm), or type (memory foam, hybrid, pocket coil). Every mattress includes a 365-night sleep trial and free delivery across Canada.
NM® HD+™ Core Mattress Collection — High‑Density Foam, Zoned Lumbar & Edge Support Compatible with Adjustable Bed Adjustable Bed Compatible Mattresses White Mattresses Beige-Tone Mattresses Mattress Selector

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Clear all NM® HD+™ Core Compatible with Adjustable Bed Compatible with Adjustable Bed Base White Beige

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NM® HD+™ Core Compatible with Adjustable Bed Compatible with Adjustable Bed Base White Beige Clear all
  • NM® HD+™ Core 6" Firm Tight Top Foam Mattress
    BEST IN CLASS TOP RATED TRENDING
    National Mattress 6-inch firm tight-top foam mattress, slim white diamond-quilted cover, charcoal piping NM Logo
    FIRM
    • 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 8
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    M5H 2N1
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  • NM® HD+™ Core 8" Medium Firm Euro-Top Foam Mattress
    BEST IN CLASS TOP RATED TRENDING
    National Mattress 8-inch medium-firm euro-top foam mattress, white diamond-quilted top, charcoal piping NM Logo
    MEDIUM
    • 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 8
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  • NM® HD+™ Advanced 8" Extra-Firm High Density Foam Mattress
    BEST IN CLASS BEST SELLING TOP RATED
    National Mattress HD 8-inch extra-firm foam mattress, white diamond-quilted tight-top, black quilted sides NM Logo
    EX-FIRM
    • Extra-Firm High Density Foam Core
    • HD Foam Support Layer
    • Cotton Fabric Quilted Top
    • 25 Year Warranty
    • Made In Toronto, Canada
    Single/Twin In stock for fast delivery $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 8
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    M5H 2N1
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  • NM® HD+™ Core Advanced 10" Extra-Firm Flippable High Density Foam Mattress
    BEST IN CLASS BEST SELLING TOP RATED
    National Mattress HD 10-inch extra-firm flippable foam mattress, white quilted top with charcoal sides NM Logo
    EX-FIRM
    • 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 In stock for fast delivery $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 8
    Pickup available icon Only Pickup available to
    M5H 2N1
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  • NM® HD+™ Core Advanced 13" Extra-Firm Pillow Top Foam Mattress
    BEST IN CLASS TOP RATED TRENDING
    National Mattress HD 13-inch extra-firm pillow-top foam mattress, tall black quilted sides, white diamond top NM Logo
    EX-FIRM
    • 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 In stock for fast delivery $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 8
    Pickup available icon Only Pickup available to
    M5H 2N1
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Upgrade your sleep at National Mattress

Discover a mattress that transforms your sleep into a truly rejuvenating experience. We offer a wide variety of options to suit every sleep style and preference, ensuring a better night's sleep.

Why Choose Us?

  • Variety: From plush to firm, we have options for every body type and sleep style.
  • Quality: Trusted brands and top-notch materials for long-lasting comfort.
  • Sleep Trials & Warranties: Enjoy peace of mind with flexible trials and warranties.
  • Expert Advice: Get personalized recommendations from our sleep specialists.

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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