NM Lullaby™ " Dual Sided Crib Mattress
Comfort IQ™ This mattress firmness is accurate and comparable to other firm mattresses (8/10). Read Full Comfort Analysis
Top Features
- Quilt
- Dual Sided Cotton Support Quilt
- Comfort Layers
- 2" HD+™ High Density Foam X2
- Support Layers
- Extra Firm HD+™ High Density Foam
- Mattress Core
- Extra Firm High Density Foam Core
- Condition
- Brand new, manufacturer sealed.
- Warranty
- 5 Year Warranty
About this Brand
Discover the NM® Orthopedic collection: durable continuous‑coil innerspring mattresses engineered for even, firm support and classic responsiveness—plus select dual‑sided (flippable) models for longer, more consistent comfort. Choose firm to extra‑firm feels with reinforced edges in Twin, Twin XL, Full/Double, Queen, and King.
SKU: NM-CRIB
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Two sides, one growing sleeper
NM Lullaby™ 6″ Dual Sided Luxury Crib Mattress
The NM Lullaby™ 6″ Dual Sided Luxury Crib Mattress is a firm (9/10) foam-core crib mattress standing 5.9 in (15 cm) tall, with a flat, coil-free support surface built for safe infant and toddler sleep. Its dual-sided cotton quilt gives the same supportive feel on both faces, so it can be rotated and used through the toddler years. Made in Canada, with a 365-night sleep trial.
Key Features
Benefits
Ideal For
Construction — Layer by Layer
Five layers, cover to core. Here's what each one is and what it does.
Cover & Quilt
Comfort Layer
Support Layer
Support Core
Sizes, Height & Weight
| Profile | Dimensions | Height | Weight |
|---|---|---|---|
| Standard | 28″ × 52″ (71 × 132 cm) | 3.9 in (10 cm) | 7.9 kg |
| Luxury 6″ | 28″ × 52″ (71 × 132 cm) | 5.9 in (15 cm) | 10.5 kg |
Real per-profile values from our catalog — both fit a standard crib footprint. Price is shown live in the buy box.
The National Mattress promise
Canadian-made, fairly priced, honestly sold.
Made in Canada and sold by salaried experts — never commission. A 365-night trial and a 10-year warranty on every NM Lullaby™ Dual Sided Luxury Crib Mattress.
| Mattress Type | Traditional, Foam Core/No Coils |
|---|---|
| Trending & Offers | New Arrival |
| Core Type | NM® HD+™ High Density Support Core |
| Core Density | 1.8 lb/ft³ |
| Core Material | Polyurethane (polyfoam) |
| Brands | NM |
| Condition | Brand new, manufacturer sealed. |
| Warranty | 5 Year Warranty |
| Sleep Position | Back Sleepers, Stomach Sleepers |
| Cover Material | SoftLux Breathable Cotton |
| Quilt | Dual Sided Cotton Support Quilt |
| Comfort Layers | 2" HD+™ High Density Foam X2 |
| Support Layers | Extra Firm HD+™ High Density Foam |
| Mattress Core | Extra Firm High Density Foam Core |
| Additional Features | Dual-Sided |
| Certifications | CertiPUR-US® certified foams. |
| Compatible With Adjustable Beds | No |
| Vented | No |
| Removable Cover | No |
| Handles | No |
| Shipping | Scheduled delivery with National Mattress. Please select your preferred delivery date in the checkout. |
| Custom Sizes Available | No |
| Product Length (inches) | 52 in |
| Product Width (inches) | 28 in |
| Product Height (inches) | 3.9 in |
| Product Length (cm) | 132 cm |
| Product Width (cm) | 71 cm |
| Product Height (cm) | 10 cm |
| Product Weight (kg) | 7.9 kg |
| Product Category | Mattress |
| Product Type | Mattress - Crib |
| Product Sub Type | Foam |
It measures 28 inches wide by 52 inches long, the standard North American crib size, so it fits a standard full-size crib or toddler bed frame. As with any crib mattress, check that the gap between the mattress and crib sides stays under two finger-widths...
It is intentionally extra firm, rated 9/10, because a firm, flat surface is the recognized standard for infant sleep, and a soft crib mattress is not considered safe for babies. The high-density foam holds its shape and resists sinking under a baby's...
Yes. It is a dual-sided design with a cotton support quilt on each face, so it offers two usable sides over its life. The mattress is made in two profiles: a 4-inch standard version and a 6-inch Lux version, both 28 by 52 inches. It is not designed to...
The foam is CertiPUR-US certified, meaning it is independently tested to strict limits for low VOC emissions and made without certain regulated chemicals. The mattress is manufactured locally in Canada rather than shipped compressed for months, so any...
It uses a SoftLux breathable cotton cover over a high-density foam core, so the surface is designed to be breathable to the touch. As with any foam crib mattress, breathability does not replace safe-sleep practice: always use only a tight-fitting sheet...
The cover is breathable cotton and is not a sealed waterproof layer, so a separate waterproof crib mattress protector is strongly recommended to guard against leaks and accidents. For cleaning, spot clean the surface with mild soap and water and let ...
It rests directly on the crib's built-in mattress support, the slatted base or metal frame inside the crib, with no box spring or separate foundation needed. Set the crib base to its highest position for a newborn, then lower it as your baby learns to...
It comes with a 365-night sleep trial and a 10-year warranty, honored directly by National Mattress in-store rather than through a distant maker. A full year is ample time to be sure it suits your nursery; if it is not right, you can return it for a ...
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