Based on Q&A session with our Chief Sleep Science Editor,

Last updated | April 5, 2024 provides objective and unbiased recommendations to help you find the best mattress for you. When you use our links to shop for products, we may earn a commission at no cost to you and in no way affects our editorial independence.

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We present our mattress reviews in a Q&A format with the intent of mirroring the thought process of how customers make mattress purchase decisions


By Brand: Molecule
3.83 out of 5.0
$999 $999

Product Description

Molecule Core Mattress is a recent addition to the Molecule Mattress collection. It was launched in May 2023 as an all foam, 10-inch high, medium firm mattress targeted at budget conscious shoppers.

Q1. What is unique about the Molecule Core mattress? Does it provide superior cooling, comfort, back support, and pressure relief?

  • Molecule Core mattress consists of three layers of polyfoam enclosed in a polyester and nylon cover. All layers of this mattress are made from 100% polyurethane foam.
  • Generally, foam mattresses retain heat. However, with Molecule Core Mattress, the top two foam layers feature contoured channels cut on the surface of the foam layers using proprietary technology RESTOREFLO™, which promotes airflow and draws away heat.
    Further, the top cover is made from a combination of polyester and, cooling nylon material using proprietary MOLECULEShield™ cool cover technology. This technology features a unique combination of heat and moisture-wicking absorption capacity to enable cool and restful sleep.
  • Molecule Core Mattress incorporates an innovative, targeted zoning technology, HEXFLO™ 7-ZONE SURFACE TECHNOLOGY, in the middle foam layer, which allows for self-adjusting support for different parts of the body.
    The middle foam layer, rather than having uniform firmness across the entire layer, is split into seven separate zones for support. Seven zones provide extra sink-in around the heavier parts of the body, the shoulders, hips, and knees to limit pressure build-up.
    At the same time, provides extra lift around the head, lower back, legs, and feet to promote better posture and neutral spine alignment.

Q2. How firm is Molecule Core mattresses?

  • The firmness of a mattress reflects how firm or plush the mattress feels when you lie on top of it. A medium-firm mattress is most suitable for average-weight sleepers. Heavy-weight sleepers choose firm mattresses for optimum support. Molecule Core Mattress is a medium firm mattress with a rating of 6 on a rating scale of 1-10 (with 1 being extra soft and 10 being extra firm).
  • It is designed to have a softer and more cushioning feel than a firm mattress.

Q3. How thick is Molecule Core Mattress?

  • Molecule Core Mattress is a medium profile mattress and is approximately 10 inches in height.

Q4. Is Molecule Core Mattress Safe?

  • The mattress is manufactured without harsh materials and chemicals. Molecule Core Mattress is made from CertiPUR-US® certified foams, which means the foam is made from environmentally friendly compounds and is made without ozone depleters, formaldehyde, mercury, lead, and heavy metals.

Q5. What sizes are available for Molecule Core mattresses?

  • Molecule Core Mattress comes in six standard sizes from twin to California king. Available sizes – Twin, Twin XL, Full, Queen, King, and California King.

Q6. Briefly discuss Molecule’s policy on shipping, delivery, risk-free trial, and warranty?

  • Molecule offers free shipping with FedEx to the 48 contiguous United States. It charges for shipping to Alaska and Hawaii.
  • Molecule offers a 100-night risk-free trial period starting from the date of delivery.
  • Molecule offers a 10-year limited warranty on mattresses purchased directly from Molecule or Molecule’s authorized retailers, located in the United States (not including US territories) or Canada.

Pros & Cons


  1. God for back sleepers, providing proper spinal alignment and support
  2. Features cooling properties to address sleeping hot during the night.
  3. Designed for targeted pressure relief
  4. Suitable for couples, accommodating different sleeping preferences.


  1. Lacks proper edge support
  2. Not optimal for restless sleepers who frequently change positions
  3. Might not provide sufficient support for individuals weighing over 200+ lbs


Whether a mattress feels firm or soft is relatively subjective. All beds should support body weight, promote healthy spinal alignment, and ensure comfortable and restful sleeping. Whether a mattress is fluffy and plush (what mattress companies call soft) or less so (what companies call firm) is purely defined based on personal preferences.

Compared to the industry standard for determining firmness, Molecule Core is classified as a medium firm. The polyfoam material does not sink as much as a memory foam mattress. Medium-firm mattresses tend to accommodate variety of sleeping position. The sleepers feel supported with neck, spine, and hip alignment.

One of the unique features of Molecule Core mattress is that the middle foam layer, rather than having uniform firmness across the entire layer, is split into separate zones for support.

HEXFLO™ 7-ZONE SURFACE TECHNOLOGY is a proprietary design feature creating different firmness across the layer, providing extra sink-in around the heavier parts of the body to limit pressure build-up and at the same time, promote extra lift around the head, lower back, legs, and feet to promote better posture and neutral spine alignment.

Material & Construction

Q1. are the unique technology, design, and materials used in the construction of the Molecule Core Mattress?

Molecule Core Mattress is made up of three layers of polyfoam.

  • Layer 1: The upper layer is made of foam that is soft and comforting with channels carved on it to promote airflow and draw away body heat, enabling comfortable sleeping. Since foam retains heat, the channels in the foam allow the heat to dissipate.
  • Layer 2: HEXFLO™ 7-ZONE SURFACE TECHNOLOGY, in the middle foam layer, allows for self-adjusting support for different parts of the body to promote better posture and neutral spine alignment.
  • Layer 3: The bottom layer is made of thick, dense polyurethane foam to provide a durable base to prevent sinking and sagging.

The three layers of the Molecule Core mattress are wrapped in a very soft cover that has a knit quality but has some texture and features an advanced cool cover with moisture-absorbing technology. The cooling technology of the mattress uses temperature-regulating materials to draw heat away for a cooler sleep. It helps to keep the body temperature low throughout the night, improving sleep quality and comfort levels.


Materials & Construction (1=Least, 5=Best) (4.25/5)
Repositioning (1=Least, 5=Best) (3.75/5)
Comfort (1=Least, 5=Best) (4.25/5)
Cooling (1=Least, 5=Best) (3.75/5)
Motion Isolation (1=Least, 5=Best) (3.50/5)
Edge Support (1=Least, 5=Best) (3.50/5)
Overall Rating 3.83/5
Rating Scale: 1 = Average, 2 = Good, 3 = Very Good, 4 = Excellent, 5 = Winner



Q1. How would you rate Molecule Core Mattress from a repositioning & responsiveness perspective?

Repositioning means that sleepers can change position quickly. Memory foam mattresses and softer foam mattresses make it harder for the sleeper to shift positions with the sinking-in feature. Since the top layer of Molecule Core Mattress is poly foam and not memory foam, it does not create a deep sinking-in feeling as a typical memory foam mattress may make, and sleepers can shift sleeping positions quickly but not as fast as sleeping on an innerspring mattress.

A responsive mattress has the ability to contour and adapt to your body’s movements, ensuring that you do not feel stuck or sink too deeply into the mattress. Molecule Core Mattress is a fairly responsive sleeping mattress and restores shape quickly providing a feeling of bounciness in the mattress.

Comfort, Back Support, Pressure Relief


Q2. How would you rate Molecule Core Mattress for providing comfort and pressure relief to sleepers?

The spinal alignment and pressure relief of a mattress are important in deciding which one to buy. To maintain good back support while you sleep, your spine must remain straight, similar to when you are standing.

For a given mattress to do this will depend on your weight, sleep position, and body shape. When a mattress, which could be extra firm, rather than absorbing body weight, may push back against your body with too much force in a focused area resulting in pain, soreness, and other problems.

In general, “pressure points” are of greatest concern for side sleepers since the body’s weight is distributed over the smallest surface area. Pressure points are less of a concern for back sleepers as the body’s weight is distributed over the entire body area, and force per unit area is minimized, creating fewer acute pressure points.

Pressure relief refers to a bed’s ability to alleviate tension at the pressure points concentrated in the shoulders, hips, and lower back region of the body. Unfortunately, no mattress delivers these two things equally well for all sleepers. Spinal alignment and pressure relief capabilities vary with weights, body shapes, and sleep positions across sleepers.

Molecule Core Mattress provides good pressure relief because of its two-layer comfort system. The top layer of the mattress provides plushness to the sleeper’s body. The second layer with its seven zones of HEXFLO™ differentiated sleep surfaces reduces pressure buildup.

Cooling & Temperature Control


Q3. How would you rate the cooling and overall temperature control characteristics of Molecule Core Mattress?

Generally, foam mattresses retain heat. However, with Molecule Core Mattress, the top two foam layers feature contoured channels cut on the surface of the foam layers which promote airflow and draw away heat. Further, the cover at the top is a combination of polyester, cooling nylon material which draws away heat.

Motion Isolation and Sharing a Bed


Q4. Does Molecule Core Mattresses provide reasonable motion isolation when sharing a bed with others?

Motion Transfer is an important thing to consider when buying new bedding. If you share your space and wake up every time their movements jostle the mattress, then it’s obvious that without proper isolation, motion transfer will occur, and the sleeper can feel when his or her partner moves or changes position.

Molecule Core Mattress is a 10-inch medium firm mattress that limits the spread of vibration. It is a mid-profile mattress that has more materials to absorb movement. The polyfoam comfort layers reduce the transfer of vibration and sleepers get less disturbance while shifting or getting up at night.

Edge Support


Q5. How would you rate the edge support of Molecule Core Mattresses?

Edge support means the support that a mattress offers around its edges. Edge support is important for all and, more importantly, for couples, as deficient performance limits both sleeping and sex to closer to the center of the bed, rather than its perimeter. Getting in and out of bed may also disturb your partner since the bed may bend when sitting on the edge.

Also, it may reduce available sleeping areas, as sleepers may tend to huddle near the center rather than feel as if he/she will slip when sleeping on the edges.

Molecule Core Mattress being a foam mattress provides fair edge support, and some sleepers may find the edges sag a little when significant pressure is applied.

Recommendation based on sleeping style

To feel fresh and energized throughout the day, our bed needs to be so welcoming that we look forward to it. A good night’s sleep boosts productivity and eases stress, though getting a night’s peaceful sleep is not that easy. Irrespective of our sleeping positions, we all need good sleep to rejuvenate and heal our bodies.

There are three basic sleep postures: Side, back, and stomach positions. Sleepers of the three different positions have specific needs and requirements in terms of comfort, support, and flexibility.

Side Sleepers:

  • The best mattresses for side sleepers aid in pressure point release while keeping their spine aligned. Side sleeping can create pressure points at the hips and shoulders, so a mattress that effectively relieves pressure in those areas is important for a comfortable sleep experience.
  • Side sleepers generally benefit from a mattress with a slightly softer to medium firmness level. A mattress that is too firm can create excessive pressure on the hips and shoulders, leading to discomfort. Softer mattresses allow for better contouring and pressure relief.
  • Molecule Core Mattress maintains the balance between pressure relief and spine alignment. The polyfoam layers of the Molecule Core mattress adapts to the body shape of sleepers, cushioning hips and shoulders and cradling the pressure prone areas without much compression.
  • Across different weight groups, Molecule Core Mattress is suitable for side sleepers who weigh between 130 and 230 pounds. However, those above 230 lbs. may find it least effective as the mattress is likely to sag. The light sleepers or those below 130 lbs. may find the mattress too firm.

Back Sleepers:

  • Back sleepers generally benefit from a medium to medium-firm mattress that provides a balance of support and contouring. Even though back sleepers typically experience less pressure on specific areas compared to side sleepers, pressure relief is still important.
  • Molecule Core is a medium firm mattress and a good choice for back sleepers. It is designed with a layer of advanced polyfoam that provides support while contouring to the body’s curves. This can help promote spinal alignment and reduce the risk of discomfort or pain. With a medium firm feel, and targeted support zones, it prevents midsection to sink in.
  • Those weighing above 130 lbs. enjoy balance and pressure relief. It cradles the joints and keeps the spine perfectly aligned. Even though light sleepers prefer softer models, yet the cushioning feel of this mattress leaves them quite satisfied.

Stomach Sleepers:

  • Molecule Core mattress can be suitable for stomach sleepers, although it’s important to consider certain factors to ensure proper support and alignment.
  • Stomach sleepers generally require a slightly firmer mattress to prevent excessive sinking and maintain proper spinal alignment. They often place more pressure on their chest and pelvis, which may lead to sagging beneath the midsection and bend the spine into a U-Shape. To avoid such occurrence, stomach sleepers need adequate support to prevent the lower back from sinking too deeply into the mattress.
  • Molecule Core mattress has a medium firm feel, which should provide the necessary support to keep the spine in a neutral position for most stomach sleepers.



Size Price Sale Price Discount
Twin XL $799 $799 0%
Twin $799 $799 0%
Full $899 $899 0%
Queen $999 $999 0%
Cal King $1199 $1199 0%
King $1199 $1199 0%
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