Molecule Mattress
Molecule Reflex Boost Medium Mattress
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The honest verdict: the Molecule Reflex Boost Medium is the supportive middle of the Reflex line, and the name is literal. Molecule builds extra LiftCOR gel support bands into the core, the hyper-targeted layer the brand rates at up to 75% more alignment, so a cushioned medium surface still pushes back where your hips and lower back need it. On a taller 12-inch all-foam build with CopperWELL cooling and high-airflow foam, it stays genuinely cool. If you want one versatile feel that suits most bodies, the Boost is the all-rounder of the line.
What it's made of, and what that does for you
An all-foam recovery mattress, 12 inches tall: an instant-cool cover and high-airflow comfort foams over the LiftCOR gel support bands, wrapped in a Lift360 reinforced edge and anchored on a high-density foam core.
- Extra LiftCOR gel support bands. The Boost is a hyper-targeted gel layer in the middle third, where the heaviest part of you settles first. Molecule rates it at up to 75% more alignment, which is why the bed reads supportive under a medium surface instead of going firm.
- CopperWELL cooling. Real copper conducts heat away from the body instead of letting it pool under your back, for cooler, more restorative sleep.
- Instant-cool cover and high-airflow foam. Open-cell comfort foams built to breathe far better than standard memory foam, so the surface does not turn into a heat trap.
- Lift360 reinforced edge. A firmer foam perimeter rings the bed, so you can sleep to the edge and sit on the side to dress without it caving in.
- High-density foam core. The base that anchors the bands and keeps the build stable. CertiPUR-US certified foams throughout, designed and assembled in the USA.
- Supportive medium, 12-inch build. Taller and more cushioned than the Reflex Firm, with a 121-night comfort trial and a lifetime limited warranty.
What you notice lying on it
Lie on your back and you feel the give at the surface first, a cushioned welcome rather than a hard board, then a beat later the LiftCOR bands answer underneath and your hips settle in without dropping past where your spine wants to be. That two-stage feel, soft entry then steady support, is the heart of the Boost. Roll to your side and the comfort foams let your shoulder and hip ease in; roll back and the bands take over, so combination sleepers are not fighting the bed. Move toward the edge and the Lift360 perimeter holds.
Who it suits, and who it does not
It is built for back and combination sleepers who want one bed for every position, for hot sleepers let down by foam that traps heat, and for active people who want recovery engineering in the most adaptable feel in the line. A supportive medium is the safe pick when two people want slightly different things, and the bed that brings alignment back if you are coming off a foam mattress gone soft in the middle. Motion isolation is excellent, so a partner getting up early barely reaches your side, and it works on an adjustable base.
If you want a firm, on-top feel, the Reflex Firm is the firmer model. For a soft, sink-in plush, the Reflex Embrace Plush is the soft option. And if you are after the lift and bounce of coils, this is an all-foam recovery bed, not a hybrid.
Why buy it from Mattress Overstock
Locally owned and serving Kentucky since 2012, with five showrooms you can walk into, in Lexington (on Nicholasville Road), Georgetown, Somerset, London, and Richmond. A supportive medium is the feel you confirm by lying down, not by reading a spec sheet, so come spend ten real minutes on this exact mattress in your own sleeping position. No appointment needed, and to check the current price, select your size to see the live Mattress Overstock price.
You get a 121-night comfort guarantee: if it is not right, exchange it for store credit toward any bed of equal or greater value (no cash refund, but no restocking-fee games either). Free local delivery and setup across the Kentucky service area, with old-mattress haul-away at no charge, and because everyone on the floor is paid the same no matter which brand you choose, the guidance you get is honest. That is part of why shoppers rate Mattress Overstock about 4.7 stars across more than 500 Google reviews.
Torn between the Boost and the firmer or softer Reflex? Compare them in the Molecule lineup, then come lie down and decide in person in Lexington, Georgetown, Somerset, London, or Richmond this week.
What makes this mattress different
Extra LiftCOR gel support bands
The Boost: a hyper-targeted gel layer in the middle third, rated by Molecule at up to 75% more alignment, so a medium surface still supports your hips and lower back.
CopperWELL cooling
Real copper conducts heat away from the body instead of letting it pool, for cooler, more restorative sleep.
High-airflow foam and instant-cool cover
Open-cell comfort foams built to breathe far better than standard memory foam, so the surface does not turn into a heat trap.
Lift360 reinforced edge
A firmer foam perimeter rings the bed, so you sleep to the edge and sit on the side without it caving in.
Excellent motion isolation
The all-foam build absorbs movement, so a partner shifting or getting up early barely reaches your side.
Adjustable-base compatible
Flexes with an adjustable base for reading or legs-elevated sleep, and works on a standard platform too.
Supportive medium, 12-inch build, 121-night trial
The versatile all-rounder of the Reflex line, taller and more cushioned than the Firm, with a lifetime limited warranty and CertiPUR-US certified foams.
The supportive all-rounder, boosted
The Reflex Boost Medium starts with Molecule's recovery recipe (an instant-cool cover, high-airflow open-cell comfort foams, and CopperWELL copper that conducts heat away) and adds the layer the line is named for.
LiftCOR gel support bands sit in the middle third of the bed, the hyper-targeted layer Molecule rates at up to 75% more alignment. They reinforce exactly where the heaviest part of you settles, which is what makes the medium surface read supportive without going firm. A Lift360 reinforced foam perimeter wraps the whole mattress so the edge holds, and a high-density foam core anchors the build, all on a taller 12-inch profile, all CertiPUR-US certified and assembled in the USA.
Want firmer? The Reflex Firm. Softer? The Reflex Embrace Plush. See the whole Molecule lineup, then come feel the difference at a Kentucky showroom.
Shop the Molecule lineup →The versatile recovery all-rounder
Back sleepers: the LiftCOR bands hold the middle third, so your hips stay level with your spine instead of sinking, the alignment Molecule engineers the Reflex around.
Combination sleepers: a supportive medium gives your shoulder room when you turn to your side, then the bands answer when you roll back, so you are not fighting the bed all night.
Hot sleepers: CopperWELL copper, an instant-cool cover, and high-airflow open-cell foam keep heat from pooling, the cool-sleeping foam bed a lot of shoppers are looking for.
Couples and edge sleepers: excellent motion isolation keeps a restless partner from waking you, and the Lift360 reinforced edge means you can sleep and sit out to the perimeter without rolling off.
Active people who want recovery: the most adaptable feel in a line built for temperature regulation and targeted support, with adjustable-base compatibility for legs-up recovery.
Probably not for you if: you want a firm, on-top feel (the Reflex Firm), a soft sink-in plush (the Embrace Plush), or the lift and bounce of coils, since this is an all-foam bed.
Specifications
| Height | 12" |
|---|---|
| Feel | Cushion Firm |
| Firmness | 8 out of 10 (10 = firmest) |
| Construction | An instant-cool cover and high-airflow comfort foams over extra LiftCOR gel support bands and a high-density foam core: 12 inches, supportive medium, all-foam. |
| Cooling | CopperWELL conducts heat away from the body, with high-airflow foam and an instant-cool cover, engineered to sleep cooler than standard memory foam. |
| Motion isolation | Excellent: all-foam construction absorbs movement, so a partner's shifts barely transfer. |
| Adjustable base | Yes, compatible with adjustable bases |
| Certifications | CertiPUR-US certified foams |
| Warranty | Lifetime limited warranty |
| Trial period | 121 days at Mattress Overstock |
Frequently asked questions
What does the "Boost" actually add?
Extra LiftCOR gel support bands. It is a hyper-targeted gel layer set into the middle third of the bed, where the heaviest part of your body settles first, and Molecule rates it at up to 75% more alignment. On a taller 12-inch build than the Reflex Firm, it makes the medium surface read more supportive without going firm.
How firm is the Boost Medium?
It is a supportive medium: cushioned across positions, but with the LiftCOR gel bands adding reinforcement underneath. Firmness is personal, so the honest answer is to lie on it. If you know you want a firm, on-top feel, the Reflex Firm is the firmer model; for a soft sink-in, the Embrace Plush.
Does it sleep cool?
Yes. CopperWELL uses real copper to conduct heat away from the body, the comfort foams are open-cell and built for high airflow, and the cover is instantly cool to the touch. It is engineered to sleep cooler than standard memory foam, which is the main reason hot sleepers look at the Reflex line.
Is it good for couples?
It is one of the better all-foam picks for couples. The foam construction absorbs movement, so when one of you shifts or climbs out early the other side barely registers it, and the Lift360 reinforced edge keeps the full width of the bed usable so neither of you is stuck in the middle.
Can I use it on an adjustable base?
Yes. The Boost is compatible with adjustable bases, so it flexes with you if you raise your head to read or sleep with your legs elevated. It also works on a standard platform, slatted frame, or foundation.
Is it a foam bed or a hybrid?
All foam. It is a recovery-focused all-foam mattress: comfort foams and LiftCOR gel bands over a high-density foam core, with no innerspring. If you specifically want the lift and bounce of coils or a cooler-running coil base, a hybrid is a different bed, and the floor can point you to one.
What is it made of, and is it certified?
From the top: an instant-cool cover, high-airflow open-cell comfort foams, LiftCOR gel support bands through the middle third, a Lift360 reinforced foam perimeter, and a high-density foam core, on a 12-inch profile. The foams are CertiPUR-US certified for content and emissions, and Molecule designs and assembles the Reflex line in the USA.
Will I notice an off-gassing smell?
A new foam mattress can release a mild, temporary new-product odor as it expands, which is normal and fades within a few days in a ventilated room. The foams are CertiPUR-US certified, an independent program that tests for emissions and restricted substances.
How do delivery and the comfort guarantee work?
Mattress Overstock delivers across Kentucky with its own team, usually next business day when your size is in stock, with free setup and free haul-away of your old mattress. You also get a 121-night comfort guarantee: if the feel is not right, exchange it for store credit toward any bed of equal or greater value (no cash refund, and no restocking-fee games). It is backed by a lifetime limited warranty.
Can I see this mattress in person near me?
Yes, and with a mattress that is the smart move. Mattress Overstock is a Kentucky-owned company that has served the state since 2012, with five showrooms you can visit: Lexington (on Nicholasville Road), Georgetown, Somerset, London, and Richmond. Come lie on this exact Boost Medium in your own sleeping position, and lay it next to the firmer and softer Reflex models while you are there. Shoppers rate Mattress Overstock about 4.7 stars across more than 500 Google reviews, delivery and old-mattress haul-away are free across the Kentucky service area, and because everyone on the floor is paid the same no matter which brand you choose, the guidance you get is honest.
Buy it from people you can actually visit
- Free local delivery To your home across Central & Eastern Kentucky.
- Free setup We place and set up your new bed in the room.
- Free old-mattress haul-away The old one goes out the same day the new one comes in.
Independently owned in Kentucky since 2012. Walk in any day (no appointment) and someone who actually knows the floor will help you find the right fit.
Still deciding?
Try it in person at any Kentucky showroom
Walk into any Mattress Overstock location, lie down, and feel the difference yourself. No appointment, no pressure. Our team has over 100 years of combined mattress experience and we're here to help you find the right fit.
