Serta
Serta iComfort Aspire Medium 14" Mattress
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The honest verdict: the Aspire Medium 14" is the Serta to try if you want the cradle of memory foam without the stuck-in-quicksand feeling. It's an all-foam bed with a true medium feel (about a 5 out of 10): soft enough that your shoulders and hips settle in, structured enough (thanks to Serta's 5-ZoneResponse support) that your lower back doesn't sag into the middle. If you sleep on your back, your side, or rotate between the two, and you share the bed with someone whose tossing wakes you up, start here.
The first few minutes lying on it
You don't drop in all at once: the cover meets you cool, then the Perfect Conform foam takes a beat to read your shape, so the cradle builds over the first minute instead of swallowing you on contact. Roll from side to back and the surface keeps up without fighting you.
What it's made of, and what that does for you
- Graphite-infused Perfect Conform memory foam and EverCool Supreme. The two layers that touch you are built to pull heat out while they contour. The graphite moves warmth away instead of letting it pool under your hips. It's Serta's direct answer to the one fair knock on memory foam: that it sleeps hot.
- A CoolFeel cover. Cool to the touch the second you lie down. (Honest note: that cool-touch sensation fades as you warm the surface. The lasting cooling is the graphite and the open foams underneath, not the cover.)
- 5-ZoneResponse support foam. The support layer isn't one flat slab. It's tuned firmer under your lower back and upper thighs, softer under your shoulders and hips, which is how a soft-feeling surface can still hold your spine straight instead of letting your midsection dip. Between those comfort foams and the core sits a denser Deep Reaction Max layer that firms the transition without going stiff, so you settle through soft into support, not onto a hard floor.
- A 7-inch Serta foam core, 14 inches in total. A tall, dense base does the structural work and soaks up motion before it crosses the bed: the reason couples stop feeling each other move. Worth measuring 14 inches against your frame and picking deep-pocket sheets before it arrives.
- CertiPUR-US certified foams, no fiberglass, a 10-year warranty, made in the USA. Built by Serta, a name that has been in American bedrooms for more than 90 years, with foams tested for content, emissions, and durability.
Who it's not for, and the team would rather say so now
- If you want a springy, "on top of the bed" feel, this isn't it. Memory foam hugs; it doesn't bounce back fast. If you'd rather lie on the mattress than in it, a coil hybrid will make you happier.
- If you want it firmer or plusher than medium, medium is the middle of this line on purpose, but it isn't for everyone. Want a deeper, softer side-sleep cradle? Its twin, the Aspire Plush 14", is the same bed tuned softer: same support build, just more give up top, so the difference is how deep you settle, not how well you're held. Lie on both for five minutes and your body usually picks one quickly. Want a firmer, flatter deck? Say so on the floor and the Mattress Overstock team will walk you to one.
- If you're an extreme hot sleeper, this fights heat better than most memory foam, but physics is physics: an all-foam bed breathes a little less than coils. If waking up sweating is your number-one problem, a hybrid will out-cool it, and the team will tell you which one.
Why buy it from Mattress Overstock
An independent Kentucky retailer since 2012, with five showrooms you can actually walk into, in Lexington (on Nicholasville Road), Georgetown, Somerset, London, and Richmond, no appointment needed. This is a bed you can come lie on in person before you commit, not just a picture on a screen.
Order a memory-foam bed sight-unseen and you're guessing. Memory foam is a feel you really do have to lie on, so ten minutes on it tells you more than ten reviews. Come find it at any of the five Kentucky showrooms, compare it against the models right beside it, and take your time. When you're ready, select your size to see the live Mattress Overstock price. You get a full 120-day comfort guarantee; if the feel isn't right, you exchange it for store credit toward any bed of equal or greater value, no cash refund, but no restocking-fee games either. Free delivery, free setup, and the team hauls your old mattress away. And everyone on the floor is paid the same no matter which bed you choose, so when the guidance is that the Aspire is or isn't your bed, there's no commission behind it.
See where it sits in the full Serta lineup, then come lie down. A few quiet minutes in your own sleeping position will settle it.
What makes this mattress different
True medium feel, all-foam
About a 5 out of 10: soft enough to cradle your shoulders and hips, structured enough that you don't sink into a hole. The most universal feel in the iComfort Aspire line.
Graphite-cooled comfort layers
Graphite-infused Perfect Conform memory foam plus EverCool Supreme pull heat away as they contour, Serta's answer to memory foam's reputation for sleeping warm.
5-ZoneResponse zoned support
Firmer under the lumbar and thighs, softer under the shoulders and hips, so a plush-feeling surface still keeps your spine in line instead of letting your midsection dip.
Quiet for couples
The all-foam build absorbs movement before it crosses the bed. If your partner gets up early or shifts all night, you stay on your side of the mattress and stay asleep.
Adjustable-base ready, no fiberglass
Bends cleanly on an adjustable frame for reading or elevating your legs, and the iComfort build contains no fiberglass.
Built to last, certified clean
A 7-inch Serta foam core under a 14-inch profile, CertiPUR-US certified foams, and a 10-year limited warranty. Made in the USA.
A soft surface that still holds your back, because the support is zoned, not flat
Stack matters more than marketing, and Serta doesn't pad this one with mystery foams. From the top down: a cool-to-the-touch CoolFeel cover, then the layers you actually feel against you, graphite-infused Perfect Conform memory foam and EverCool Supreme, which contour to your shape while moving heat off the surface.
Below the comfort layers sits a denser Deep Reaction Max transition foam that firms the handoff so you settle through soft into support, not onto a hard floor. Then comes the part that does the structural work: a 5-ZoneResponse support layer over a 7-inch Serta foam core, tuned firmer beneath your lower back and upper thighs and softer beneath your shoulders and hips. That zoning is how the surface can feel medium-soft while your spine stays straight instead of hammocking in the middle. The whole bed stands 14 inches tall.
Cross-shopping the line? The Aspire Medium and the Aspire Plush 14" share this exact support build, the Plush just adds more give up top. The practical difference is how deep you settle, not how well you're held. Lie on both for five minutes and your body picks one quickly.
See the full Serta lineup →Made for the way most people actually sleep
Back sleepers: the medium feel is close to ideal, enough contour to take pressure off your tailbone, enough zoned support under the lumbar that your lower back doesn't dip. You lie flat and stay aligned.
Combination sleepers: if you start on your side and finish on your back, you won't fight the surface as you roll. The cradle keeps up with you instead of trapping you in one position.
Couples: a tall, all-foam build absorbs movement before it crosses the mattress. If one of you gets up at 5 a.m. or shifts constantly, the other side stays still. It's one of the quietest beds on the floor for motion.
Side sleepers who run warm: you get the shoulder-and-hip cradle side sleeping needs, with graphite and EverCool foams working against the heat memory foam is known for. If you sleep deep on your side and want even more give, look at the Aspire Plush 14".
Adjustable-base owners: the all-foam build bends cleanly with the frame, so reading position and zero-gravity both work without the bed fighting the hinge.
Probably not for you if you want a firm, springy, on-top-of-the-bed feel, or heat is the single biggest thing keeping you up. A coil hybrid will serve either of those better, and the Mattress Overstock team will point you to one on the floor.
Specifications
| Height | 14" |
|---|---|
| Feel | Medium |
| Firmness | 5 out of 10 (10 = firmest) |
| Construction | CoolFeel cover over graphite-cooled memory foams, a 5-ZoneResponse support layer, and a 7-inch Serta foam core: 14 inches in total. |
| Cooling | Graphite-infused Perfect Conform memory foam and a cool-to-the-touch CoolFeel cover move heat away from the surface, with EverCool Supreme foam adding airflow underneath. |
| Motion isolation | Excellent: the all-foam build absorbs movement before it reaches the other side of the bed, so you don't feel a partner shift. |
| Adjustable base | Yes, compatible with adjustable bases |
| Certifications | CertiPUR-US certified foams |
| Warranty | 10-year limited warranty |
| Trial period | 120 days at Mattress Overstock |
Frequently asked questions
How firm is the Serta iComfort Aspire Medium 14"?
It's a true medium, about a 5 out of 10 (10 being firmest). You feel a gentle memory-foam cradle at the surface, while Serta's 5-ZoneResponse support keeps your lower back from sinking. One honest quirk of memory foam: it firms up slightly in a cool room and softens in a warm one, so give it a few minutes to settle to your body and your bedroom temperature.
Is it memory foam or a hybrid?
All-foam memory foam, with no coils. It's a 14-inch stack of cooling, contouring memory foams over a zoned support layer and a dense 7-inch Serta foam core. That build is what gives it the close, pressure-relieving hug and the strong motion isolation. If you specifically want the bounce and airflow of coils, ask the team about a hybrid instead.
Does it really sleep cool for memory foam?
It's built to. The cover is cool-to-the-touch, and the comfort layers are graphite-infused Perfect Conform memory foam plus EverCool Supreme, which move heat off the surface instead of letting it pool under your hips. Honest framing: that cool-touch cover sensation fades as you warm it, and an all-foam bed still breathes a little less than coils. It fights heat better than most memory foam, but if waking up sweating is your number-one problem, a hybrid will out-cool it.
Does it contain fiberglass?
No. The Serta iComfort build does not contain fiberglass. The foams are CertiPUR-US certified, meaning they've been tested for content, emissions, and durability and are made without ozone depleters, heavy metals, or formaldehyde.
How is it different from the Aspire Plush 14"?
Same support build, different surface feel. The Aspire Medium lands in the middle of the line; the Aspire Plush 14" adds more softness on top for a deeper side-sleep cradle. Most shoppers should lie on both, and the right one is usually obvious within a couple of minutes.
Will it isolate motion if I share the bed?
Yes, this is one of its strengths. The tall, all-foam construction absorbs movement before it travels across the mattress, so a partner getting up early or rolling over won't pull you out of sleep. It's one of the quietest beds on the Mattress Overstock floor for motion.
Does it work with an adjustable base?
Yes. The Aspire Medium is adjustable-base compatible, so it bends cleanly for reading, watching TV, or elevating your head and legs. Ask the team about pairing it with an adjustable frame in the showroom.
What height is it, and will my sheets fit?
It stands 14 inches tall. That's a tall profile, so measure it against your bed frame and pick deep-pocket fitted sheets (look for ones rated to at least 15 inches) so they don't pop off the corners. Worth checking before delivery day.
How do delivery and the comfort guarantee work?
Mattress Overstock delivers across Kentucky with its own team, and most in-stock sizes arrive the next business day, with free setup and old-mattress haul-away included. You get a 120-day comfort guarantee: if the feel isn't right, you exchange it for store credit toward any bed of equal or greater value (no cash refund). The team usually suggests giving any new foam bed about three weeks before you decide, since both the foam and your body need time to adjust.
Can I see this mattress in person near me?
Yes, and with memory foam you really should, because it's a feel you have to lie on. 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 mattress in your own sleeping position, compare it against the models right beside it, and take your time. Everyone on the floor is paid the same no matter which brand you choose, so 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.
