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Showing mattresses available in : Toronto GO
  • Over 5,000 Mattresses In Stock
  • Wholesale/Outlet Pricing
  • Everything Brand New and Sealed
  • Free Delivery On Orders Over $199

NM HD 8" Extra-Firm High Density Foam Mattress - King

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.

Top Features

– Extra-Firm High Density Foam Core

– HD Foam Support Layer

– Cotton Fabric Quilted Top

– 25 Year Warranty

– Made In Toronto, Canada

Our Price:
$564.00
Retail Price $999.00
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Applicable Offers

NM HD 8" Extra-Firm High Density Foam Mattress - King
Style Traditional, Foam Core/No Coils
Firmness Extra Firm
Coil Count N/A
Coil Type N/A
Core Type NM® HD+™ High Density Support Core
Core Density 1.8 lb/ft³
Height 8 Inches
Collection NM® HD+™ Core
Model Core - Extra Firm 8" Tight Top - King
Warranty 25 Year Warranty
Condition Brand new, manufacturer sealed.
Comfort Scale
  • Soft
  • Medium
  • Firm
  • Extra Firm
Comfort IQ™: This mattress is EXTREMELY FIRM compared to other extra-firm mattresses. (12/10)
Recommended For: Back Sleepers, Stomach Sleepers

NM HD 8" Extra-Firm High Density Foam Mattress - Elevate Your Sleep Experience

Introducing the NM HD 8" Extra-Firm Mattress, meticulously designed for those who prioritize robust support and enduring comfort in their nightly rest. Proudly manufactured in Toronto, Canada, this mattress redefines firmness with an impressive rating (12/10), offering a refreshing sleep surface that ensures you wake up rejuvenated and free of aches. Experience the perfect blend of strength and coziness, and indulge in restful nights you deserve.

Key Features

  • High Density Foam Core: Provides exceptional firmness to stabilize your body and maintain ideal spinal alignment, ensuring a relaxing slumber.
  • Stability-Enhancing Support Layer: Reduces motion transfer significantly, allowing undisturbed, peaceful sleep, no matter your sleeping partner's movements.
  • Soft Cotton Quilted Surface: Delivers a breathable and inviting top layer, combining coolness and a gentle plush feel—perfect for warm summer evenings.
  • Comprehensive 10-Year Warranty: Invest in your peace of mind with a decade-long warranty, attesting to the quality and longevity of your mattress.
  • Crafted Locally in Toronto, Canada: Enjoy the confidence of purchasing a product that embodies superior craftsmanship and is proudly made in Canada.

Benefits

  • Unmatched Firmness: Perfect for back and stomach sleepers, this mattress provides a firm foundation that aligns with your body’s anatomy, reducing the risk of discomfort.
  • Safety Certainty: Rest easy with CertiPUR-US certified foams, ensuring your mattress is free from harmful chemicals and providing a safe sleep environment.
  • Comfort Meets Stability: Revel in a sleep space that merges hardness and softness, cultivating a serene atmosphere for you to unwind and recharge every night.

Ideal For

This mattress caters to individuals who seek unyielding firmness and support, particularly back and stomach sleepers aspiring to achieve a rejuvenating, pain-free night’s sleep. Transform your nightly routine with the NM HD 8" Extra-Firm Mattress.

Details

  • Dimensions: 76″ x 80″ (inches) – 193cm x 203cm (centimeters)
  • Profile Height: 8 Inches
  • Firmness Level: Extra Firm
  • Comfort Layers: 1/4″ Poly-Fill for enhanced plushness
  • Generous Guarantees: Enjoy free next day delivery, a 100 Night comfort assurance, full manufacturer's warranty, and a price match promise for ultimate confidence in your purchase.

Experience the unparalleled comfort and steadfast support of the NM HD 8" Extra-Firm Mattress, specifically designed to meet the demands of serious sleep enthusiasts. Investing in this mattress means investing in remarkable sleep quality every night, preparing you for whatever lies ahead.

More Information
Mattress Size

King

Mattress Type

Traditional, Foam Core/No Coils

Features

Low Motion Transfer, Zoned Lumbar Support, Edge Support

Trending & Offers

Best Selling

Firmness

Extra Firm

Core Type NM® HD+™ High Density Support Core
Core Density 1.8 lb/ft³
Core Material Polyurethane (polyfoam)
Brands NM
Price Range Great Value
Model Core - Extra Firm 8" Tight Top - King
Collection NM® HD+™ Core
Condition Brand new, manufacturer sealed.
Warranty 25 Year Warranty
Sleep Position Back Sleepers, Stomach Sleepers
Cover Material Breathable Cotton Blend
Colour White, Black
Quilt 1/2″ High Density Foam Support Quilt
Comfort Layers 1/4″ Poly-Fill
Support Layers Extra Firm HD+™ High Density Foam
Mattress Core 8″ Extra Firm High Density Foam
Mattress Height in Inches 8.00 Inches
Additional Features Edge Guard
Certifications CertiPUR-US® certified foams.
Compatible With Adjustable Beds No
Vented No
Removable Cover No
Handles No
Care Instruction Spot clean. Mattress protector recommended.
Country of Origin Canada
King Size Dimensions 76" x 80" (inches) - 193cm x 203.2cm (centimeters)
Custom Sizes Available Yes
Product Length (inches) 80 in
Product Width (inches) 76 in
Product Height (inches) 8 in
Product Weight (lb) 96.700000
Product Length (cm) 203.2 cm
Product Width (cm) 193 cm
Product Height (cm) 20.3 cm
Product Weight (kg) 43.8 kg
Product Barcode 2000575001738
Product Model Code NM-CORE
Product SKU NM-CORE-KING
Product Category Mattress
Product Sub Category Tier Value
Product Type Mattress - Foam Core
Product Sub Type Traditional - Tight-Top

NM Brand Mattresses

Exceptional Comfort. Locally Crafted. Unmatched Value.

At NM, we believe everyone deserves a great night's sleep without overspending. That's why our NM Brand mattresses are proudly manufactured locally, ensuring exceptional quality and unbeatable prices you simply won't find anywhere else.

Premium Quality, Affordable Prices

Each NM mattress is thoughtfully crafted with premium materials and meticulous attention to detail, delivering outstanding comfort and support for every sleeper. By partnering directly with trusted local manufacturers, we eliminate unnecessary markups and bring you unmatched value.

Designed for Every Budget and Preference

Whether you prefer a firm mattress for optimal support, a plush surface for luxurious comfort, or something perfectly balanced, NM has the right mattress for your needs. Our wide range ensures you'll find the perfect match without stretching your budget.

Why Choose NM Brand?

  • Locally Manufactured: Supporting Canadian craftsmanship and quality control.

  • Superior Value: High-quality mattresses at unbeatable prices.

  • Variety and Versatility: Comfort options to suit every sleep preference and budget.

  • Durable and Reliable: Built to provide lasting comfort night after night.

Discover the NM difference—affordable, comfortable sleep that's locally crafted for your best night's rest.

Greater Toronto Area and Ontario Delivery Map

What’s Included

We offer FREE DELIVERY to all major cities in Ontario and the surrounding area on orders over $199. A delivery surcharge of $45 applies to orders under $199.

Select your delivery date at checkout (if applicable) and add any special instructions in the order comments (e.g., “Ring Buzzer #1234”). If a date isn’t shown or selected at checkout, you’ll receive an email with scheduling options. Day‑of, you’ll get a text and email with a 2‑hour window and live tracking. Estimates apply to in‑stock items; rural or weather‑affected addresses may require extra time.

Greater Toronto Area and Ontario Free Mattress Delivery Map

Ontario Local Delivery Areas

Next‑day available
Halton Region
Burlington • Oakville • Milton • Georgetown • Halton Hills
Next‑day available
Peel Region
Mississauga • Brampton • Caledon
Next‑day available
City of Toronto
York • Including Downtown Core
Next‑day available
York Region
Vaughan • King • Richmond Hill • North York • Aurora • Newmarket • Markham • Scarborough
Next‑day available
Durham Region
Pickering • Ajax • Whitby • Oshawa • Whitchurch‑Stouffville
Next‑day available
Waterloo Region
Guelph • Kitchener • Cambridge • Waterloo
Next‑day available
Hamilton
Including Dundas • Grimsby • Stoney Creek • Ancaster
1–3 days on average
Niagara
Niagara Falls • Niagara‑on‑the‑Lake • St. Catharines • Thorold • Welland
Next‑day & 1–3 days
Simcoe Region
Barrie • Innisfil • Orillia • Midland • Collingwood • Bradford • Washago and more
1–3 days on average
Northern &
Eastern Ontario
Cobourg • Peterborough • Kawartha Lakes • Minden • Haliburton • Port Perry • Bowmanville and more
1–3 days on average
Western Ontario
London • Stratford • Woodstock • Brantford • Grand Bend • Port Elgin • Tobermory and more

Note: Please select your delivery date at checkout (if applicable). Add any special instructions in the comments box. If a delivery date isn’t available at checkout, you’ll receive an email with date options after your order is processed. If the proposed date doesn’t work, reply to reschedule.

 

Need delivery outside the GTA?

We also ship to all provinces in Canada at competitive rates (territories excluded). Enter your postal code at the top of the website to see what’s available.

Ready to Sleep Better?

Shop online 24/7 or visit any National Mattress location across Ontario. Spend $199+ and relax—your new mattress will arrive quickly and free of charge locally, or ship fast across Canada.

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Frequently Asked Questions

Where does National Mattress offer free local delivery?

We offer FREE local delivery to major cities across Ontario on orders of $199+. Check the region cards above for specific cities.

Do you ship mattresses across Canada?

Yes. We ship select roll‑packed mattresses to all provinces (YT, NT, NU excluded). Transit times range from 1–2 days in ON & QC to 3–4 days in BC and NL after shipping.

Is next‑day delivery available in the GTA?

Yes. FREE next‑day local delivery is available in many GTA and surrounding areas, subject to inventory and cutoff times.

What if my Ontario local order total is under $199?

A $45 delivery surcharge applies to orders under $199.

How do I schedule or change my delivery date?

Select a date at checkout. If a chosen date isn’t available, you’ll receive an email proposing an alternative—simply reply to reschedule. In‑store purchases can be scheduled at the time of sale.

Will I get tracking updates?

Yes. Local deliveries include day‑of text/e‑mail with a 2‑hour window plus live GPS tracking. Canada‑wide shipments include a courier tracking number once picked up.

Do you deliver to Yukon, Nunavut, or the Northwest Territories?

No. We currently do not deliver to YT, NU, or NT.

© National Mattress. All rights reserved.

Customer Questions
What type of mattress protector should I use that wont feel hot or noisy?
Look for waterproof protectors made with soft, breathable fabrics and a quiet backing layer. Modern protectors are often designed to feel like a regular sheet while still blocking liquids and minimizing crinkling sounds when you move at night.
Will this mattress hold its shape over time?
This extra-firm mattress is engineered with durable support and comfort materials to help maintain its shape and feel for many years under normal use. Following the care and support guidelines on the product page will help you maximize its performance...
Does this mattress come with a warranty?
Yes. This mattress includes a warranty from the manufacturer. Check the product details or warranty tab on the page to see the length of coverage, what is included, and any conditions that apply.
Is this tight top mattress better suited for a primary bedroom or a guest room?
This mattress offers a specific combination of comfort, support, and durability that may make it ideal for nightly use in a primary bedroom. Review the firmness, build quality, and price point to decide where it best fits in your home.
Can this mattress be used long-term as my primary bed?
This low motion transfer mattress is designed for regular nightly use when matched with the right foundation and care. Review the durability details, warranty information, and recommended maintenance to see how it is intended to perform as a long-term...
Is this tight top mattress suitable for my sleep position?
This tight top mattress has a specific firmness and support profile that will suit some sleep positions better than others. Check the comfort description and any recommended sleep positions in the product details to see whether it is ideal for side, ...
Does this mattress have strong edge support?
This extra-firm mattress includes edge-support features such as reinforced coils or denser foam rails to help reduce roll-off and make it comfortable to sit or sleep near the edge. Check the product description for more details on how the edges are ...
Has this foam mattress been tested for emissions or safety standards?
This foam mattress is manufactured to meet applicable safety and flammability regulations, and its foams may be tested for content and emissions. Check the product details for specific information on any standards, certifications, or safety testing ...
Can this king mattress be used on a storage bed or platform bed?
Most king mattresses are compatible with platform and storage beds as long as the base provides adequate, even support. Check the product details for any specific base recommendations and ensure your frame's slats or platform are sturdy and properly...
Is this king mattress comfortable for everyday use?
This king mattress is designed for regular nightly use with a balance of comfort and support suitable for its intended sleeper group (such as couples, families who co-sleep, or single adults who want extra space). Check the firmness level, materials...
Will this king mattress fit my existing bed frame?
Most king bed frames are designed for a mattress around 76 x 80. Check your frame's inner dimensions and compare them with the mattress measurements on the product page to ensure a proper fit without gaps or overhang.
Is this mattress a good choice if my partner and I have different builds?
This extra-firm mattress is designed to provide very strong support across the surface, which can help when there is a weight difference between partners. If one partner prefers more cushioning, consider pairing this mattress with a topper on their ...
Is this mattress appropriate if I have back problems?
This zoned lumbar support mattress is engineered to provide reinforced support for the lower back, but suitability depends on your specific condition and comfort needs. Review the firmness, support technologies, and customer feedback, and consider speaking...
Will this tight top mattress hold its shape over time?
This tight top mattress is built with support and comfort materials selected to help maintain its shape and feel under normal use. Review the durability details, warranty information, and care recommendations on the product page to see how to get the...
Is this king mattress suitable for everyday use in a primary bedroom?
This king mattress is designed for regular nightly use, with a balance of comfort and support suitable for couples or single sleepers who want extra space. Check the firmness, materials, and customer reviews on the product page to make sure it matches...
How long does it take for a king mattress to fully expand after unboxing?
Most boxed king mattresses expand to near full size within a few hours, but they may continue to relax and reach their final feel over 24-72 hours. Room temperature, ventilation, and the specific materials can affect expansion time; follow the manufacturer...
What are the exact dimensions of this 8 inch mattress?
This mattress is approximately 8 inches high and is available in standard sizes such as Twin, Twin XL, Full, Queen, and sometimes King, as well as RV or specialty sizes. Check the size chart on the product page for precise width, length, and height measurements...
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