Sierra Sleep by Ashley
Sierra Sleep 10 Inch Chime Elite 2.0 Mattress
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The Sierra Sleep 10 Inch Chime Elite 2.0 is a straightforward firm mattress built for one job: keep you level and supported all night, no plush give required. If you know you sleep best firm and dislike the feeling of sinking into a bed, this one is worth a look. If you want softness and a deep hug, this is the wrong bed for you.
The Build
This is a tight top, all foam mattress, meaning there is no separate pillow top layer riding above the support core. The surface goes straight from cover to foam, which is exactly how a firm mattress should be built. Underneath the micro cool technology cover, a layer of high density response memory foam contours lightly to the shoulders and hips without letting them sink far, and it sits over a green tea infused base foam that carries most of the mattress's 10 inch height. Green tea infusion is a common way foam makers help keep a mattress fresher over years of use, and the denser base foam underneath is what keeps a firm mattress firm instead of softening and dipping in the middle a few years in. Ashley builds this one under its Sierra Sleep label as the 10 Inch Chime Elite 2.0, model M425, and it carries a 10 year non-prorated manufacturer's warranty.
Feel and Support
The micro cool cover is a heat dispersing fabric meant to pull warmth away from the body, which matters more than usual on an all foam mattress since foam sleeps a little warmer than a hybrid by nature. Because there are no coils in this build, motion transfer is minimal, so a partner turning over or getting up early is unlikely to wake you. The trade off is that a firm all foam mattress needs a supportive base underneath it: a platform or foundation is recommended (sold separately). Like any bed shipped compressed in a box, it also needs about 48 hours after unboxing before it reaches its true feel and full firmness.
Who It Suits
Back and stomach sleepers tend to do best here: a firm surface keeps the hips lifted and the spine level in both positions, without the sag a softer bed allows. Combination sleepers who move around at night and want one stable surface underneath them, whatever position they land in, are usually happy on this bed too. It is also a reasonable pick for a growing kid's room in Twin, or a guest room and primary bedroom alike in California King, since the same firm, no nonsense support works across both. Side sleepers should be more careful: a genuinely firm surface can put pressure on the shoulder and hip, and lighter side sleepers tend to fare better on it than heavier ones. As with any mattress, fit depends on body weight and personal preference more than any spec sheet, so treat this as a starting point, not a guarantee.
Available Sizes
- Twin
- California King
Firm is one of those words that means something different to every sleeper, so the only real way to know if the Chime Elite 2.0 is your kind of firm is to lie down on it. Come try it in person at one of our Kentucky showrooms and feel it under your own back before you decide.
What makes this mattress different
Firm, no pillow top
A tight top design skips the pillow top layer entirely, so you sleep on a flatter, more supportive surface built for genuine firm support, not a softened version of one.
Response memory foam comfort layer
High density response memory foam sits right under the cover, contouring lightly to the shoulders and hips without letting them sink far into the bed.
Green tea infused base foam
A denser green tea infused foam layer carries most of the mattress's height and keeps the firm feel from breaking down or dipping in the middle over time.
Micro cool technology cover
A heat dispersing cover fabric pulls warmth away from the body, working against the extra warmth that all foam beds tend to hold onto.
Quiet, stable surface
No coils means minimal motion transfer, so a partner turning over or getting up early is unlikely to disturb your side of the bed.
10 year non-prorated warranty
Ashley backs the Chime Elite 2.0 with a full 10 year non-prorated manufacturer's warranty against structural defects.
Adjustable base compatible
The all foam build flexes cleanly with an adjustable base if you like to sleep or read with your head raised, and it also sits flat and stable on a platform or standard foundation.
Two sizes, one firm feel
Available in Twin and California King, so the same steady, no give support works whether it's going in a kid's room or a primary bedroom.
A tight top build made to stay firm
The Chime Elite 2.0 skips the pillow top most mattresses lean on and goes straight from cover to foam, which is the simplest way to build a mattress that actually stays firm. From the top down, the build starts with a micro cool technology cover designed to disperse heat away from the body, since an all foam mattress without a cooling layer can run warm. Beneath the cover sits a layer of high density response memory foam, thin enough to take the hard edge off the surface while still keeping you lifted rather than cradled.
That comfort layer rests on a green tea infused base foam that makes up most of the mattress's 10 inch profile. The base foam is the real reason this bed stays firm: it is dense enough to resist compression, so the middle of the mattress will not soften and sag the way a thinner or lower density core can after a few years of nightly use. Green tea infusion is a common approach mattress makers use to help the foam stay fresher over its life. There are no coils anywhere in this build, which is also why motion transfer is so low. Ashley backs the Chime Elite 2.0, model M425, with a 10 year non-prorated warranty.
See the full Sierra Sleep lineup →Built for sleepers who want to stay on top of the bed
Back sleepers: firm support keeps the hips from dipping, holding the spine level instead of letting the lower back arch into a soft surface.
Stomach sleepers: this is the position that benefits most from a firm bed. A softer mattress lets the hips sag first; the Chime Elite 2.0 keeps the midsection level instead.
Combination sleepers: if you move between positions through the night, a stable, even surface underneath you means less readjusting no matter where you land.
Kids and growing bedrooms: the Twin size, paired with a genuinely firm and durable core, holds up well through years of a kid's room without the sag that a cheaper soft mattress can develop.
Lighter side sleepers: a firm surface can still work if you are lighter bodied, since there is less weight pressing the shoulder and hip into the firmer layers.
Probably not for you if: you are a heavier side sleeper who needs real cushion at the shoulder and hip, or you simply prefer a plush, sink in feel. A soft topper can help, but if you know you like a hug from your mattress, this firm, tight top build is not the one to fight against.
Specifications
| Height | 10 in |
|---|---|
| Feel | Firm |
| Firmness | Firm, tight top (no pillow top) |
| Construction | Micro cool technology cover over high density response memory foam, over a green tea infused base foam, 10 inches total, no coils. |
| Cooling | Micro cool technology cover disperses heat away from the body to offset the extra warmth typical of an all foam build. |
| Motion isolation | Very good. The all foam, coil free build absorbs movement so a partner shifting or rising early is unlikely to be felt. |
| Warranty | 10 year non-prorated manufacturer's warranty |
Frequently asked questions
How firm is the Sierra Sleep 10 Inch Chime Elite 2.0?
It is a genuinely firm, tight top mattress with no pillow top layer. The surface has a thin layer of response memory foam for a touch of contour, but the feel underneath is firm, supportive, and meant to keep you on top of the bed rather than sinking into it.
What is the mattress made of?
It is an all foam build: a micro cool technology cover over a layer of high density response memory foam, resting on a green tea infused base foam that carries most of the mattress's 10 inch height. There are no coils in this construction.
Does this mattress sleep hot?
The micro cool technology cover is a heat dispersing fabric built to pull warmth away from the body, which helps offset the extra warmth that all foam mattresses can hold onto compared to a hybrid.
Is it good for a heavier sleeper?
The dense green tea infused base foam is built to resist compression and keep the firm feel from breaking down. It suits back and stomach sleepers of most body types well; heavier side sleepers who want more shoulder cushion may want to feel it in person before deciding.
Can I use this mattress with an adjustable base?
Yes, the all foam construction is adjustable base compatible and also works well on a standard platform or foundation, sold separately.
What sizes does the Chime Elite 2.0 come in?
It is available in Twin and California King, which makes it a fit for a kid's room, a guest room, or a California King primary bedroom that wants a genuinely firm, no frills mattress.
How long is the warranty?
Ashley backs the 10 Inch Chime Elite 2.0, model M425, with a 10 year non-prorated manufacturer's warranty.
Does Mattress Overstock offer an at-home trial on this mattress?
No. Sierra Sleep beds, including the Chime Elite 2.0, do not come with an at-home trial period. The honest way to know if a firm bed is right for you is to lie down on this exact mattress at one of our Kentucky showrooms before you buy.
Can I see and try this mattress in person?
Yes. Visit one of our Kentucky showrooms to lie on the Chime Elite 2.0 in your own sleep position. Firm is different for every sleeper, and a few minutes on the actual mattress tells you more than any spec sheet.
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.
