NM 10" Firm Memory Foam Mattress Performance & Feel - Full Comfort Analysis
Overview: The NM 10" Firm Memory Foam Mattress is a value-focused all-foam mattress from National Mattress's own Cozy collection (est. 2012), featuring a Soft Luxurious Cotton Removable Cover, 2-inch Visco Memory Foam with High Compression Foam, Pressure Relieving Comfort Foam, and a high-density 1.8 lb/ft³ Optimal High Resilient Bio-Foam support core. With perfect 10.0 scores for motion isolation and pressure relief, this Canadian-made firm mattress (7/10) delivers exceptional body-hugging contour with deep cradle sinkage (2.42 inches) at an outstanding value. The main trade-offs are cooling (7.0) and responsiveness (7.0), typical of all-foam memory foam construction, making this best suited for side sleepers who prioritize pressure relief and motion isolation over temperature regulation.
Realistic Expectations
These scores reflect realistic expectations based on construction, materials, and verified owner feedback. Your results will vary by body type, base, and room temperature.
Quick Specs
| Spec | Details |
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| Mattress Type | All-Foam (Memory Foam with Foam Core) |
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| Firmness | 7/10 (Firm) |
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| Mattress Height | 10 in (25.40 cm) |
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| Comfort Layer Thickness | 2.5 in (6.35 cm) |
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| Queen Price | $598 |
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| Fiberglass-Free | Yes |
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| Ships in a Box | Yes |
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| Certifications | CertiPUR-US® certified foams |
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Comfort IQ™ Scores are derived from published specifications, materials, and construction details to help compare mattresses consistently.
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Best For
- Side sleepers seeking exceptional pressure relief at an outstanding value, as the 2-inch Visco Memory Foam and Pressure Relieving Comfort Foam create a deep cradle at the shoulders and hips with perfect 10.0 pressure relief despite the firm rating.
- Couples seeking maximum motion isolation on a budget, as the slow-response memory foam absorbs movement exceptionally well with a perfect 10.0 motion isolation score to minimize partner disturbance throughout the night.
- Budget-conscious shoppers who want a Canadian-made memory foam mattress with CertiPUR-US certification and a removable, washable cotton cover at just $598 for a Queen.
Considerations
- Hot sleepers should note the cooling score (7.0) and settling temperature of 29.2°C (84.6°F); all-foam memory foam designs retain more heat than hybrids, so keeping the bedroom cool and using breathable bedding is essential.
- The responsiveness score (7.0) reflects slower memory foam response; those who prefer a springy, quick-response feel or who change positions frequently may find the surface slower to respond than hybrid mattresses.
- Edge support (7.4) is fair for an all-foam mattress; sleepers who sit on the edge frequently or sleep near the perimeter will notice more compression than with foam-encased hybrid mattresses.
Feel & Firmness
At 7/10 on the firmness scale (slightly softer than other firm mattresses), the NM 10" Firm Memory Foam Mattress delivers a unique combination of firm support with deep body-hugging contour. With 2.42 inches (6.15 cm) of sinkage, you will experience a deep cradle feel where the memory foam conforms closely to your body shape. The 0.5-inch Cotton Channel Quilted Cover provides a soft sleep surface, while the 2-inch Visco Memory Foam with High Compression Foam and Pressure Relieving Comfort Foam create body-hugging contour. The high-density 1.8 lb/ft³ Optimal High Resilient Bio-Foam support core beneath maintains firm support to prevent bottoming out.
The responsiveness score of 7.0 reflects that this mattress is more contouring and slower to respond than hybrid or innerspring mattresses. Switching positions can take a bit more effort as the memory foam slowly conforms to your new position. However, the firmer support helps you push off and reposition, and the thin memory-foam layer adds contouring without removing all the ability to move. This slow-response characteristic is ideal for sleepers who stay in one position most of the night.
Cooling
This mattress earns a 7.0 cooling score, which is fair for an all-foam memory foam design. The Soft Luxurious Cotton Removable Cover with Cotton Channel Quilting provides some breathability at the sleep surface. However, without the open airflow channels that pocket coil systems provide, all-foam memory foam mattresses naturally retain more heat. In temperature observations, the mattress showed a baseline of 22.0°C (71.6°F), a maximum of 32.7°C (90.9°F), and settled at 29.2°C (84.6°F). Hot sleepers should keep the bedroom cool, use breathable bedding, and may want to consider a hybrid mattress for better temperature regulation.
Motion Isolation
Scoring a perfect 10.0 for motion isolation, this all-foam mattress excels at minimizing sleep disturbances. The slow-response Visco Memory Foam helps absorb movement before it spreads across the sleep surface, while multiple comfort foam layers add additional vibration control. Unlike hybrid mattresses where coils can transfer some vibration, the dense foam construction contains motion exceptionally well. This is ideal for couples where one partner moves frequently or has different sleep schedules, as getting in and out of bed causes minimal disturbance to the other sleeper.
Edge Support
With a fair 7.4 edge support score, this mattress provides acceptable perimeter stability for an all-foam design. The supportive Optimal High Resilient Bio-Foam core at 1.8 lb/ft³ and firmer overall feel help the edges hold their shape for sleeping or sitting closer to the side. Maximum edge sinkage was measured at 5.15 inches (13.08 cm), which is typical for a 10-inch all-foam mattress without dedicated edge reinforcement. Sleepers who sit on the edge of the bed frequently or couples who need to use the full sleep surface should be aware of this limitation.
Pressure Relief
The NM 10" Firm Memory Foam Mattress earns a perfect 10.0 pressure relief score. The all-foam build with layered memory foam creates a deep cradle at the shoulders and hips, allowing pressure points to sink into the conforming foam while support foams stabilize the sink to prevent bottoming out. The Visco Memory Foam with High Compression Foam and 1.8 lb Pressure Relieving Comfort Foam work together to distribute body weight evenly. This design is ideal for side sleepers who need maximum pressure relief at the shoulders and hips.
Off-Gassing
As an all-foam mattress with CertiPUR-US® certified foams, this mattress may have a mild initial odour upon delivery that typically dissipates within 2 days based on reported experience. Memory foam mattresses that ship compressed in a box may have slightly more noticeable initial odour than hybrid mattresses, but the CertiPUR-US certification ensures low VOC emissions.
For best results, unbox the mattress in a well-ventilated room and allow it to expand and air out for several hours before adding bedding. Since this mattress ships compressed in a box, it may take 24-48 hours to fully expand to its 10-inch height. The removable cotton cover can also be washed before first use to ensure a fresh sleeping environment.
Construction & Materials
The NM 10" Firm Memory Foam Mattress is a Canadian-made all-foam mattress from National Mattress's own Cozy collection (est. 2012), designed to deliver affordable, value-focused performance. The Soft Luxurious Cotton Removable Cover with non-skid bottom allows for easy cleaning and care. The quilted layer features 0.5-inch Cotton Channel Quilting for a soft sleep surface. The comfort system includes 2-inch Visco Memory Foam with High Compression Foam for body-contouring comfort, plus 1.8 lb Pressure Relieving Comfort Foam. The 7.5-inch support core consists of Optimal High Resilient Bio-Foam at 1.8 lb/ft³, which provides stable, consistent support and helps resist sagging over time. This value-focused construction is backed by a 10-year warranty and ships conveniently boxed and rolled for easy handling.
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| Layer (Top → Bottom) |
Material |
Thickness |
Notes |
| 1 | Soft Luxurious Cotton Removable Cover | Quilted | Removable, washable |
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| 2 | Cotton Channel Quilting | 0.5 in (1.27 cm) | Soft surface layer |
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| 3 | Visco Memory Foam + High Compression Foam | 2 in (5.08 cm) | Body-contouring comfort |
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| 4 | Pressure Relieving Comfort Foam | 1.8 lb density | Pressure point cushioning |
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| 5 | Optimal High Resilient Bio-Foam | 7.5 in (19.05 cm) | 1.8 lb/ft³ high-density |
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Sleep Position & Body Weight Fit
Despite the firm rating (7/10), the deep sinkage and exceptional pressure relief make this mattress particularly well-suited for side sleepers who need their shoulders and hips to sink into a conforming surface. The layered memory foam creates a deep cradle while the high-density bio-foam core supports neutral alignment by resisting sagging. The conforming foams fill the lumbar curve without letting hips sink excessively. Back sleepers will find good support as the firmer feel helps keep the pelvis from tilting. Stomach sleepers may find the deep sinkage allows too much hip drop; firmer options with less contouring may be more suitable.
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| Sleeper Weight |
Side Sleepers |
Back Sleepers |
Stomach Sleepers |
| Under 150 lb | Excellent | Good | Fair |
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| 150-250 lb | Excellent | Good | Fair |
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| 250-300 lb | Good | Good | Fair |
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| 300+ lb | Fair | Fair | Not ideal |
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Policies & What To Know
Related shopping help:
Shop all NM mattresses
Shop all Memory Foam mattresses
Shop Firm mattresses
FAQs
Is the NM 10" Firm Memory Foam good for hot sleepers?
This mattress scores 7.0 for cooling, which is fair for an all-foam memory foam design. The breathable cotton cover helps manage temperature, but memory foam naturally retains more heat than hybrids with coil airflow. Temperature observations showed the mattress settling at 29.2°C (84.6°F). Hot sleepers should keep the bedroom cool and use breathable bedding, or consider a hybrid mattress for better cooling.
Does the NM 10" Firm Memory Foam feel like you sink in or stay on top?
Despite the firm rating (7/10), you will sink into this mattress noticeably. With 2.42 inches (6.15 cm) of sinkage, the Visco Memory Foam creates a deep cradle with body-hugging contour. The memory foam conforms closely to your body shape, providing an enveloping feel rather than an on-top sleeping experience.
Is it a good choice for couples?
This mattress is good for couples, earning an 8.2 Couples/Intimacy score. It excels in motion isolation (10.0) with the slow-response memory foam absorbing movement exceptionally well to minimize partner disturbance. The trade-offs are lower bounce (7.2) than hybrid mattresses and fair edge support (7.4). Couples who prioritize motion isolation over bounce will appreciate this mattress.
What sleep positions is it best for?
The NM 10" Firm Memory Foam is best suited for side sleepers who need exceptional pressure relief at the shoulders and hips. The perfect 10.0 pressure relief score means the memory foam creates an ideal cradle for side sleeping. Back sleepers will find good support. Stomach sleepers may find the deep sinkage allows too much hip drop; firmer options may be more suitable.
How long does off-gassing usually last?
Based on owner feedback and the CertiPUR-US® certified foams used in this mattress, any initial odour is typically mild and dissipates within 2 days. Since this mattress ships compressed in a box, unbox it in a well-ventilated room and allow it to expand for several hours before adding bedding. The removable cotton cover can also be washed before first use.
Is the cover removable and washable?
Yes, the Soft Luxurious Cotton Removable Cover features a non-skid bottom and can be removed for washing. This is a convenient feature that allows you to keep your mattress fresh and clean over time. Follow the care instructions on the cover label for best results.
