NM HD+ Advanced 8" Extra-firm High Density Foam Mattress - Queen, Certipur-us Certified, Made in Canada Reviews

4.8 Rating 38 Reviews

The NM HD+ Advanced 8" extra-firm high-density foam mattress is a solid slab of high-density foam, standing 8 inches tall. It's designed for back and stomach sleepers who prefer to sleep on top of the bed, rather than sinking into it. The mattress features zoned lumbar support, an Edge Guard perimeter, and a seamless, coil-free build that absorbs movement. The foam core has a density of 1.8 lb/ft³, which helps resist softening and body impressions over time. The mattress is made in Canada and is certified by CertiPUR-US. It's available in a queen size and comes in white and black colors.

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Phone:

800-631-4883

Email:

support@nationalmattress.ca

Location:

1655 Dundas Street East,
Mississauga
Ontario
L4X 1L5

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How would you rate the firmness of this mattress? Slightly firmer than expected

In what position do you sleep in? Combination

What is your body weight range? 130 - 230 lbs

Do you tend to sleep hot? Yes

Do you share your bed with a partner? Yes

“Bought this mattress thinking “extra firm” was probably just marketing talk. Nope. This thing has the structural integrity of a Toronto sidewalk in winter. The first night, my body was confused, my spine filed a happiness report, and somehow I woke up without sounding like bubble wrap when getting out of bed. Jokes aside, it’s actually super comfortable if you like solid support. No sinking, no rolling into the middle, and no waking up feeling like you lost a fight with your mattress overnight. The quilted top keeps it from feeling too harsh, and it stays surprisingly cool. Also, motion isolation is legit — my partner moves around like they’re auditioning for WWE in their sleep and I barely notice. If you want a soft cloud-like mattress, this isn’t it. But if you want something supportive, durable, and firm enough to make chiropractors proud, this is a fantastic buy.”

Helpful Report

Posted 3 months ago

How would you rate the firmness of this mattress? Softer than expected

In what position do you sleep in? Side

What is your body weight range? 130 - 230 lbs

Do you tend to sleep hot? Yes

Do you share your bed with a partner? Yes

“The mattress is ok ,I slept comfortable with good dreams”

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Posted 4 months ago

How would you rate the firmness of this mattress? Firmer than expected

In what position do you sleep in? Back

What is your body weight range? 130 - 230 lbs

Do you tend to sleep hot? Yes

Do you share your bed with a partner? No

“Very firm better than i expected”

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Posted 4 months ago

How would you rate the firmness of this mattress? As expected

In what position do you sleep in? Combination

What is your body weight range? 130 - 230 lbs

Do you tend to sleep hot? No

Do you share your bed with a partner? Yes

“I had been dealing with back pain while sleeping on my old mattress, and most options in the market felt too soft and lacking proper support. After a lot of research, I finally chose this extra-firm mattress—and it’s been a great decision so far. It provides excellent back support, and the long replacement warranty is an added bonus. If you’re looking for a truly firm mattress, this one is definitely worth considering.”

1 Helpful Report

Posted 5 months ago

How would you rate the firmness of this mattress? Extra Firm

“It feels like sleeping on stones”

1 Helpful Report

Posted 8 months ago

How would you rate the firmness of this mattress? Extra Firm

“I’ve been looking for a mattress that provides real support, and the NM HD 8" Extra-firm delivers. It is a true extra-firm feel—very supportive with almost no 'sink,' which has been great for my back alignment. The high-density foam feels durable and solid, and I appreciate the decade-long warranty for peace of mind. The breathable cotton quilted top is a nice touch; it adds a bit of surface comfort without making the bed feel soft or trapping heat”

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Posted 8 months ago

How would you rate the firmness of this mattress? Extra Firm

“The mattress is extra firm and gives good support to my back. I feel comfortable sleeping on it”

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Posted 8 months ago

How would you rate the firmness of this mattress? Extra Firm

“Love the new Extra Firm mattress. No sagging at all, and gives me great support. I sleep like a baby throughout the night. So far so good!”

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Posted 9 months ago