Sierra Sleep by Ashley
Sierra Sleep Chime 8 Inch Memory Foam Mattress
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Verdict: the Chime 8 Inch is Sierra Sleep's entry point into memory foam, a plain, honest tight top bed for anyone who wants pressure relief without a tall profile or a big price tag.
Sierra Sleep builds the Chime 8 Inch, model M726, as a straightforward two part mattress: a memory foam comfort layer over a firmer foam support base. There is no pillow top, no coil system, and no elaborate quilting pattern padding out the price. The comfort layer softens under your shoulders and hips while the base foam keeps the middle of the mattress from bottoming out, so the bed still feels supported instead of collapsing under body weight.
Feel and support
Retailers consistently describe this model as medium firm with a tight top surface, and that lines up with what an 8 inch all foam build can deliver: enough give at the surface to relieve pressure points, enough foam underneath to keep your spine level through the night. Because it is all foam with no coils, movement on one side of the bed does not travel to the other, which matters if you share the mattress with a partner or a restless dog. A new foam mattress can feel a touch firmer in a cool room and soften slightly once it warms to body temperature, which is normal for this type of build.
Who it suits
Back and stomach sleepers tend to like the firmer side of medium, since the support foam keeps hips from sinking and the spine level. Side sleepers who find plush memory foam too soft often land here too, since the tight top gives some cushion at the shoulder without a deep sink. Guest rooms, rentals, first apartments, and kids' rooms are an easy fit, since the price and profile do not ask you to invest in a premium bed for a room that does not need one.
Skip it if you specifically want a plush, sink in feel or a taller mattress with several comfort layers stacked underneath. Sierra Sleep's own step up models and the rest of our memory foam lineup go deeper if that is what your body wants.
Available sizes
- Twin
- Full
- Queen
- King
The Chime 8 Inch ships compressed in a box and expands to full size once it is unboxed, ready for a compatible foundation, a platform bed, or an adjustable base (a matching foundation is sold separately if your frame needs one). Firmness is personal, so the best way to know if medium firm is right for you is to come lie on this exact mattress at one of our Kentucky showrooms, right next to the taller Sierra Sleep models, and compare the feel for yourself.
What makes this mattress different
A clean two-layer build
No coils and no pillow top: a memory foam comfort layer sits directly over a firmer support foam base, so there is less bed to break down over time.
Medium firm, tight top surface
Retailers consistently place the Chime 8 Inch in the medium firm range with a smooth, tight top finish rather than a quilted pillow top.
Quiet when your partner moves
An all-foam build with no coil system keeps motion from one side of the mattress from traveling to the other.
Ships compressed in a box
The mattress compresses for delivery and expands to full size once it is unboxed, so setup is a one-person job.
Fits almost any foundation
Use it on a compatible foundation, a platform bed, or an adjustable base. A matching foundation is sold separately if your frame needs one.
Four sizes, one build
Twin, Full, Queen, and King all share the same comfort layer and support foam, just scaled to size.
Light enough to carry
A Queen weighs about 49 pounds boxed, manageable for two people up a flight of stairs without renting equipment.
An entry point into Sierra Sleep
The Chime 8 Inch is Ashley's Sierra Sleep line at its simplest, model M726, built for anyone who wants memory foam without paying for layers they will not feel.
Two layers, kept simple
The Chime 8 Inch keeps its construction simple by design. On top sits a memory foam comfort layer, the part that softens under your shoulders and hips and gives the mattress its medium firm, tight top feel. Underneath is a thicker base of firmer support foam that carries most of the mattress's 8 inch height, keeping the middle of the bed from sagging and giving the comfort layer something solid to rest on.
Because the whole mattress is foam with no coil system, it compresses for shipping and holds up without springs working loose or migrating over time. That same all-foam build is what isolates motion: a partner rolling over on their side of the bed is far less likely to disturb you on yours. At 8 inches, it is a lean profile that dresses with standard sheets and sits well on a platform bed, a compatible foundation, or an adjustable base.
If you want a taller build with a deeper comfort layer, look at the rest of the Sierra Sleep lineup. The Chime 8 Inch is intentionally the simplest, most affordable way into memory foam in that family.
See the full Sierra Sleep lineup →Built for a firmer, no-frills feel
Back sleepers: the medium firm surface keeps your hips from dropping while the comfort layer softens under your shoulder blades, a setup that suits most back sleepers well.
Stomach sleepers: a firmer surface is exactly what this position needs. The Chime 8 Inch does not let the hips sink the way a plush bed would.
Side sleepers who do not want a deep sink: if plush memory foam beds feel too soft to you, the tight top medium firm feel here gives some cushion at the shoulder without swallowing you.
Guest rooms, kids' rooms, and first apartments: an 8 inch profile and a straightforward build make this an easy, budget-friendly choice for a room that does not need a premium mattress.
Couples: the all-foam construction keeps one partner's movement from waking the other, a real advantage over an older coil mattress.
Probably not for you if: you want a deep, plush cradle or a taller mattress with multiple comfort layers. Dedicated side sleepers who like to sink in should look at a softer, taller model in the Sierra Sleep lineup instead.
Specifications
| Height | 8 in |
|---|---|
| Feel | Medium Firm |
| Firmness | Medium firm, as consistently described across retailers |
| Construction | Memory foam comfort layer over a firmer support foam base, no coils: 8 inches total |
| Motion isolation | Good, the all-foam build keeps movement from transferring across the mattress |
Frequently asked questions
How firm is the Sierra Sleep Chime 8 Inch?
It sits in the medium firm range with a tight top surface, based on how it is consistently described across retailers. A memory foam comfort layer takes the edge off, but the firmer support foam underneath keeps the bed from feeling soft or sinking in the middle.
Is the Chime 8 Inch memory foam or a hybrid?
All foam, no coils. A memory foam comfort layer sits over a firmer support foam base, which is what gives it the quiet, no-motion-transfer feel of a foam mattress rather than the bounce of a coil or hybrid design.
Who is this mattress best for?
Back and stomach sleepers tend to do well on the firmer side of medium, and side sleepers who do not want a deep sink can also be comfortable here. If you want a plush, sink-in feel, look at a taller model with a deeper comfort layer instead.
Is 8 inches enough mattress?
For a value-priced, firmer feel, yes. Eight inches is a lean profile built around two layers rather than four or five, which keeps the price down and the setup simple. It fits standard sheets and works on a platform bed, a compatible foundation, or an adjustable base.
Does it sleep hot?
Like most all-foam mattresses without a dedicated cooling layer, it will run a little warmer than a coil or hybrid design with more airflow. If staying cool at night is your top priority, ask our showroom team about a hybrid option instead.
Can I use it on an adjustable base?
Yes. The all-foam build flexes with an adjustable base as well as a platform bed or a compatible foundation. If you are not sure what base your frame needs, our showroom team can help you sort it out before delivery.
Does Mattress Overstock offer a trial period on this mattress?
No. Sierra Sleep mattresses, including the Chime 8 Inch, do not come with an at-home trial period. The honest way to know if the feel is right for you is to lie on this exact mattress at one of our Kentucky showrooms before you buy.
Can I see this mattress in person near me?
Yes, and with a firmer, budget-focused mattress like this one, trying it in person is the best way to know it is right for you. Mattress Overstock is a Kentucky-owned company with showrooms in Lexington, Georgetown, Somerset, London, and Richmond. Come lie on the Chime 8 Inch in your own sleeping position, and our team, paid the same no matter which brand you choose, can walk you through the rest of the Sierra Sleep lineup if you want to compare feels.
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.
