Sierra Sleep by Ashley
Sierra Sleep 10 Inch Chime Memory Foam Mattress
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The verdict: if you sleep on your back or stomach and want a mattress that holds you up instead of pulling you down into it, the Sierra Sleep Chime 10 Inch earns a look. It is a firm, no-frills memory foam bed built to keep your body resting on top of the surface, not sinking into the middle of it.
An Ashley House Brand, Built Simple
Sierra Sleep is Ashley's own in-house mattress line, and the Chime series (model M699) is the straightforward end of that lineup. There is no marketing gimmick layered on top, just a memory foam mattress that ships compressed and rolled in a box for easier delivery and handling. Once it is unboxed and given room to breathe, it unrolls and expands on its own into its full 10 inch profile, typically within a few hours depending on the temperature of the room.
Firm From Edge to Edge
The build is simple by design: a memory foam comfort layer sits directly over a supportive foam core, and the combination reads firm and consistent across the whole surface. Instead of cradling your hips and shoulders the way a plush bed does, the Chime is built to push back, keeping your spine in a more level position while you sleep. The materials used are hypoallergenic, a small but real detail if allergies or sensitivities in the bedroom are part of your decision.
- Firm, tight top memory foam feel
- 10 inch profile, compact enough to dress with standard sheets
- Memory foam comfort layer over a supportive foam core
- Hypoallergenic materials
- Ships compressed and rolled, expands after unboxing
- Works with adjustable bases if your setup changes down the road
- Available in Twin, Full, Queen, King, and California King
Who Tends to Sleep Well on It
Back and stomach sleepers are the natural fit here. A firm surface keeps the hips from dropping and the lower back from arching, which is exactly what those two positions need most. It also suits anyone who has tried a plush mattress before and felt like they were fighting their way out of it every morning, or a couple who both lean firm and do not want to negotiate a middle ground. Because the whole bed reads consistent from corner to corner, it holds up evenly whether one sleeper is heavier than the other.
Who Should Look Elsewhere
Committed side sleepers are usually the exception. A firm, tight top surface can leave more pressure at the shoulder and hip than a side sleeper wants, so if that is your primary position, a plusher Sierra Sleep model or a different line on our floor is worth comparing before you decide. The same goes if you specifically want a deep, slow-sinking hug rather than support.
See It in Person
Firmness is one of those things that reads differently on paper than it does under your own body. Come lie on the Chime 10 Inch at one of our Kentucky showrooms, in your normal sleep position, for a few minutes before you decide. It is the fastest way to know whether this firm, straightforward build is the one that gets you out of bed feeling rested.
What makes this mattress different
Firm, tight top from edge to edge
No soft perimeter or plush give at the corners, the Chime reads consistently firm across the whole sleeping surface.
Memory foam over a supportive core
A memory foam comfort layer sits directly on a supportive foam core, built to keep your body resting on top rather than sinking in.
Ships compressed, expands on its own
The mattress arrives rolled and compressed in a box, then unrolls and reaches its full 10 inch height within a few hours of unboxing.
Hypoallergenic materials
Built with hypoallergenic materials, a useful detail for anyone managing allergies or sensitivities in the bedroom.
Adjustable base friendly
The all-foam build flexes cleanly on an adjustable base, so it can move with your setup if your needs change later.
Lean 10 inch profile
A compact height that dresses easily with standard sheets and sits well on a platform bed or foundation.
An Ashley house-brand build
Sierra Sleep is Ashley's own in-house mattress line, and the Chime (model M699) is its straightforward, no-frills firm option.
Full size run
Available in Twin, Full, Queen, King, and California King, so it fits a guest room, a growing family, or a primary bedroom.
A simple, firm build with no wasted layers
The Chime 10 Inch keeps its construction deliberately simple. A memory foam comfort layer sits directly over a supportive foam core, with no transition layers or zoned sections in between. That directness is what gives the mattress its firm, tight top feel: your body rests on top of the surface instead of settling into a deep contour.
The whole mattress totals 10 inches, a lean profile that keeps the build stable and easy to dress with standard sheets. Because it is all foam with no coils, the Chime ships compressed and rolled into a box. Once it is unboxed and given room to breathe, it unrolls and expands on its own into its full height, typically over a few hours depending on the room. The materials used are hypoallergenic, and the finished mattress works cleanly with an adjustable base if you want that flexibility.
See the full Sierra Sleep lineup →Built for the back and stomach sleeper who wants firm
Back sleepers: the firm, tight top surface keeps the hips from dropping and the spine level, which is what most back sleepers rest best on.
Stomach sleepers: this position needs firm more than any other. A soft mattress lets the hips sag and the lower back arch; the Chime keeps you level instead.
Firm-leaning couples: if you and your partner both prefer a firm bed, the Chime gives you a consistent surface with nothing to negotiate.
Anyone with allergy concerns: the mattress is built with hypoallergenic materials, a small but real plus for a sensitive bedroom.
Budget-conscious shoppers who still want memory foam: the Chime is Sierra Sleep's straightforward entry point, without extras layered in that push the price up.
Probably not for you if: you sleep mainly on your side, where a firm, tight top surface tends to load more pressure into the shoulder and hip, or if you specifically want a deep, slow-sinking hug rather than support.
Specifications
| Height | 10 in |
|---|---|
| Feel | Firm |
| Firmness | Firm, tight top feel with little surface give |
| Construction | Memory foam comfort layer over a supportive foam core, 10 inches total, all foam with no coils. |
Frequently asked questions
How firm is the Sierra Sleep Chime 10 Inch?
It is built firm and consistent from edge to edge, with a memory foam comfort layer sitting directly over a supportive foam core. There is no plush give at the surface, the goal is to keep your body resting on top of the mattress rather than sinking into it.
Who is this mattress best for?
Back and stomach sleepers tend to do best on it, since a firm surface keeps the hips from dropping and the spine level. Side sleepers usually find a softer Sierra Sleep model or a different line on our floor more comfortable.
Is the Chime memory foam or a hybrid?
All foam, no coils. A memory foam comfort layer sits over a supportive foam core, which is part of why the mattress ships compressed and rolled in a box rather than flat.
How does delivery and unboxing work?
The mattress arrives compressed and rolled inside a box. Once you unbox it and give it room to breathe, it unrolls and expands on its own into its full 10 inch height, typically within a few hours depending on the temperature of the room.
Can I use the Chime on an adjustable base?
Yes. The all-foam build is adjustable-base friendly and also sits well flat on a platform bed or a solid foundation.
What sizes does the Chime 10 Inch come in?
Twin, Full, Queen, King, and California King, so it fits a guest room, a growing family, or a primary bedroom.
Does the Sierra Sleep Chime include an at-home trial?
No. Sierra Sleep beds, including the Chime, do not include an at-home trial. Our Kentucky showrooms are where you try it before you buy it, lie on the Chime in your own sleep position on the floor so you know how it feels before it comes home with you.
Is the Chime a good fit for a guest room or growing family?
Yes. Its straightforward, firm build and full size run from Twin through California King make it an easy, no-fuss pick for a guest room, a kid moving into a bigger bed, or a primary bedroom on a budget.
Can I see this mattress in person near me?
Yes, and with any mattress that is the better way to decide. Mattress Overstock is a Kentucky-owned company that has served the state since 2012, with showrooms across Kentucky. Come lie on this exact mattress in your own sleeping position before you decide. Delivery is free across the Kentucky service area with old-mattress haul-away, 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.
