Medium Extra Firm Memory Foam Mattresses
Extra firm mattresses are the firmest, most supportive feel we carry — a hard, no-sink surface that holds your body on top of the mattress rather than letting it settle in. They're built for stomach sleepers, heavier-weight sleepers and anyone who finds a standard firm mattress still too soft, delivering maximum support and spinal alignment. Most use a tight-top or high-density foam construction (including orthopedic Chirofoam), with budget-friendly options that keep extra-firm support affordable. Shop Beautyrest, Serta, Chirofoam, Springwall and our own NM line — from $152, with free delivery across Canada. • Feel: extra firm is the firmest of our four comfort levels — a hard, no-sink surface • Best for: stomach sleepers, heavier-weight sleepers, and anyone who wants maximum support • Choose this over firm if a standard firm mattress still feels too soft • Consider firm or medium if you sleep on your side or want any cushioning • Constructions: tight-top and high-density foam (including orthopedic Chirofoam) • Brands: Beautyrest, Serta, Chirofoam, Springwall & NM • Prices: from $152 — an affordable, value-focused selection
Shop memory foam mattresses from Tempur-Pedic, Serta iComfort, Sealy Cocoon, NM, and Chirofoam at National Mattress — available in Single/Twin through King from $95 to $6,640. Our collection of 35+ models includes graphite-infused, gel-infused, and TEMPUR® material options in extra firm, firm, medium, and plush comfort levels. Every memory foam mattress features CertiPUR-US® certified foam, pressure point relief, and cooling technology. Most models are manufactured in Canadian factories, ship free across Canada, and include a 365-night sleep trial with 10–15 year warranty coverage.
- SERTA® Spectrum™ 8" Medium-Firm Gel Memory Foam Mattress
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How to Choose the Right Memory Foam Mattress
Memory foam mattresses contour to your body shape, relieving pressure at the shoulders, hips, and lower back while absorbing motion so partner movement doesn't transfer across the bed. The key decision factors are foam density, firmness level, and cooling technology. Higher-density foams (1.8+ lb/ft³) retain their shape longer and provide more durable support, while lower-density foams offer a softer initial feel at a lower price point. National Mattress carries memory foam models from Tempur-Pedic, Serta iComfort, Sealy Cocoon, Chirofoam, and our own NM Cozy series in firmness levels from extra firm to plush.
If you sleep hot, look for graphite-infused or gel-infused memory foam with a cool-touch cover — these materials draw heat away from the sleep surface more effectively than traditional memory foam. Side sleepers generally need a medium or plush model for adequate shoulder and hip relief, while back and stomach sleepers benefit from firm or extra firm options that prevent the pelvis from sinking too deeply. Over 98% of our memory foam mattresses are adjustable base compatible, and all use CertiPUR-US® certified foam.
Cooling Technology
Graphite-infused, gel-infused, and CoolFeel™ cover options across iComfort, TEMPUR®, and Sealy Cocoon collections to manage sleep temperature.
Low Motion Transfer
Memory foam absorbs movement rather than transferring it — ideal for couples and light sleepers who are disturbed by partner movement.
Pressure Point Relief
Body-contouring foam cradles hips, shoulders, and joints to reduce pressure points — a key benefit for side sleepers and those with joint discomfort.
Canadian-Made
Over 72% of our memory foam mattresses are manufactured in Canadian factories with free delivery and 10–15 year warranty coverage.
Frequently Asked Questions About Memory Foam Mattresses
What is the difference between memory foam and regular foam mattresses?
Do memory foam mattresses sleep hot?
How long does a memory foam mattress last?
Are memory foam mattresses good for back pain?
Can I use a memory foam mattress on an adjustable base?
Does National Mattress offer a sleep trial on memory foam mattresses?
Not Sure Which Memory Foam Mattress Is Right for You?
Our non-commissioned sleep experts can help you compare foam types, firmness levels, and brands — no sales pressure, just honest guidance.
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.
