NAPSIE Full Size Memory Foam Mattress in a Box, 12 Inch Review
A NAPSIE full size memory foam mattress in a box, 12 inches thick, built with 3 stage TriCool Tech heat dissipation, CertiPUR-US certified foam made in the USA, and a 10 year limited warranty.
| Brand | NAPSIE |
|---|---|
| Part number | NAPSIE-MD-12F |
| Model | MNP120F00MDT |
| Size | Full |
| Height | 12 in |
| Length | 75 in |
| Best for | Buyers wanting a medium plush, cooling gel infused full size mattress shipped in a box |
Product Overview
NAPSIE builds this mattress around 3 stage TriCool Tech, combining a breathable TENCEL cover, cooling gel memory foam and egg crate foam, aimed at sleepers who want a medium firmness feel without overheating overnight.
Underneath the cooling layer, dedicated Aerofushion and BraceSleeper foam layers are built for pressure relief and spinal alignment, positioning the mattress as more than a single slab of memory foam.
Score Breakdown
This verdict is based on the manufacturer's stated specifications, the current Amazon listing and its product images, the confirmed materials and design, real buyer ratings, and our research into the product category. Scores are consistent editorial judgments, not laboratory measurements, and we did not receive a paid sample.
Key Features
TENCEL cover, cooling gel memory foam and egg crate foam.
Adapts to the body to relieve pressure points.
Maintains spinal alignment.
Foam made in the USA.
Included for peace of mind.
Design and Build Quality
The mattress carries part number NAPSIE-MD-12F and model MNP120F00MDT, measuring a stated 12 inches thick, 75 inches long and 54 inches wide for the Full size. Foam is CertiPUR-US certified and made in the USA, paired with Oeko-Tex Standard 100 certified fabric for a stated child-safe, chemical-free sleeping environment.
NAPSIE backs the mattress with a 10 year limited warranty, though the listing notes it cannot be returned once opened, making the choice of size and firmness upfront more important than with a returnable mattress.
Performance in Everyday Use
Cooling performance centers on the TriCool Tech system: a breathable TENCEL cover combined with cooling gel memory foam and an egg crate structure that creates 3D airflow channels, aimed at preventing heat buildup and sweat accumulation overnight.
Pressure relief runs through the Cooling Aerofushion Foam, which is built to adapt to the body and relieve pressure points, while a separate BraceSleeper Support Foam layer is positioned to maintain spinal alignment for sore backs.
How It Performs: The Evidence
| Decision factor | What we found | Evidence and measurement | Score | Why it matters |
|---|---|---|---|---|
| Heat dissipation | 3 stage TriCool Tech | Listing states TriCool Tech combines a TENCEL cover, cooling gel memory foam and egg crate foam | 8.3 | Confirms the stated cooling system claim |
| Pressure relief | Aerofushion Foam, egg crate surface | Listing states the Cooling Aerofushion Foam adapts to the body and the egg crate surface cradles high-pressure areas | 8.4 | Confirms the stated pressure relief claim |
| Spinal support | BraceSleeper Support Foam | Listing states spinal alignment is maintained by the BraceSleeper Support Foam | 8.2 | Confirms the stated support claim |
| Certification | CertiPUR-US certified, made in USA | Listing states CertiPUR-US certified memory foam proudly made in USA | 8.5 | Confirms the stated certification claim |
| Dimensions | 12 x 75 x 54 in | Listed item height, length and width | 8.0 | Confirms the mattress's physical size for a Full bed frame |
| Warranty | 10 year limited warranty | Listing states a 10 year limited warranty is included | 8.3 | Confirms the stated coverage term |
Who Should Buy It
- Buyers wanting a medium plush, cooling mattress
- Full size bed frames needing a 12 inch mattress
- Hot sleepers wanting gel-infused cooling foam
- Buyers wanting a CertiPUR-US certified mattress
- Anyone wanting a firm or ultra-soft mattress feel rather than a medium plush option
- The listing states the mattress cannot be returned once opened, raising the stakes on choosing the right firmness upfront
- Medium plush is a single firmness option, not adjustable or offered in multiple firmness levels on this listing
- At 12 inches thick it needs a bed frame or foundation with adequate clearance
- Sold in the Full size only on this listing
Full Specifications
How It Compares
| Feature | NAPSIE | Typical option | Higher-tier option |
|---|---|---|---|
| Heat management | 3 stage TriCool Tech cooling system | Standard foam with no cooling layers | Comparable cooling gel memory foam mattress |
| Pressure relief | Aerofushion Foam with egg crate surface | Single-layer flat foam | Comparable pressure-relief foam mattress |
| Spinal support | Dedicated BraceSleeper Support Foam layer | No dedicated spinal support layer | Comparable support-layer mattress |
| Certification | CertiPUR-US certified, Oeko-Tex fabric | Uncertified foam and fabric | Comparable certified foam mattress |
| Warranty | 10 year limited warranty | Shorter or no stated warranty | Comparable 10 year warrantied mattress |
Alternatives Worth a Look
A 12 inch full size memory foam mattress with a 3 stage cooling system, CertiPUR-US certified foam and a 10 year limited warranty. It suits buyers wanting a medium plush, temperature-regulated mattress shipped in a box, with the main thing to know being it cannot be returned once opened.
Frequently Asked Questions
How thick is this mattress?
A stated 12 inches.
What size is it?
Full, measuring 75 by 54 inches.
Is it certified?
Yes, CertiPUR-US certified memory foam and Oeko-Tex Standard 100 certified fabric.
What warranty is included?
A 10 year limited warranty, per the listing.
Can it be returned after opening?
No, the listing states it cannot be returned once opened.
What firmness is it?
Medium plush, per the listing.
This review is based on the manufacturer's stated foam layers, certifications, dimensions and warranty as listed. It is editorial analysis of the stated specifications, not independent hands on testing of this specific mattress's firmness or cooling performance.