Sierra Sleep by Ashley
Sierra Sleep 14 Inch Chime Elite 2.0 California King Mattress
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Verdict: this is the plush pick in the Sierra Sleep lineup, built for sleepers who want to sink in at the shoulders and hips without the mattress going flat underneath. If you already know you like a firm, minimal give surface, this Chime Elite 2.0 is not your bed.
How it's built
The 14 Inch Chime Elite 2.0 (Ashley model M427) is a tight top design, no quilted pillow top, so the plush feel comes from the foam stack itself rather than a loose top layer that can shift or flatten early. Under the micro cool technology cover, a layer of high density response memory foam does the close contouring, with Laytec foam worked into the comfort system for added cushion at the surface. Below that sits a supportive transition foam that keeps the mattress from feeling like it bottoms out, and a green tea infused base foam anchors the build at a full 14 inches. There are no coils in this mattress, it is foam from top to base, which is part of why it stays quiet and why it needs a solid platform or an adjustable base underneath rather than an old box spring.
Feel and support
Lie down and the memory foam takes a moment to catch up with your body, then holds you in place at the shoulders and hips while the transition layer keeps your spine from sagging in the middle. That combination favors side sleepers, who need give at the shoulder, and back sleepers who prefer a gentler surface to a firm one. Combination sleepers who roll through the night will also find the top forgiving as they shift, though anyone who moves position quickly may notice the foam needs a beat to respond. Because the build is all foam, motion transfer is minimal, a partner getting in or out of bed on a California King barely registers on the other side.
Who it suits, and who should skip it
- Side sleepers who want real pressure relief at the shoulder and hip
- Back sleepers who prefer plush over firm
- Couples who want a quiet mattress with minimal motion transfer
- Sleepers cautious of memory foam running hot: the micro cool cover helps, though any deep foam layer runs warmer than a hybrid
- Stomach sleepers and anyone who wants a firm, minimal sink surface should look elsewhere in the Sierra Sleep line
- Shoppers picturing a tall pillow top: this is a tight top, the plush comes from the foam underneath, not a loose topper
At 14 inches, this California King dresses with standard deep pocket sheets and works on a platform bed, an adjustable base, or any solid foundation sold separately. Give it about 48 hours after unboxing to fully expand before you judge the feel, foam mattresses need that time to reach their true softness. Sierra Sleep also builds this same Chime Elite 2.0 comfort feel in other sizes, so if California King is not the right footprint for your bedroom, the feel carries over.
Backed by a 10 year non prorated warranty, the Chime Elite 2.0 earns its ultra plush label honestly. Plush is subjective though, especially at this depth of foam, so come lie on the actual mattress at one of our Kentucky showrooms before you commit. It is the fastest way to know if this is the soft side of the spectrum you were picturing.
What makes this mattress different
Tight top, no pillow top
The plush feel comes from the foam stack itself, not a loose quilted layer on top, so there is nothing to flatten or shift out of place early.
High density response memory foam
The top comfort layer contours closely at the shoulders and hips for the deep, body hugging feel the Chime Elite 2.0 is built around.
Laytec foam comfort layer
Worked into the comfort system for extra cushion at the surface, adding softness without losing the contouring underneath.
Supportive transition foam
Sits between the comfort layers and the base to keep the mattress from bottoming out under heavier areas of the body.
Green tea infused base foam
Anchors the full 14 inch build and gives the mattress its stable, quiet foundation.
Micro cool technology cover
Designed to pull heat away from the surface, helping offset the warmth that comes with a deep memory foam comfort system.
Quiet, all foam build
No coils means minimal motion transfer, a real advantage for a shared California King bed.
Adjustable base compatible
Works on a platform, a solid foundation, or an adjustable base, so you are not limited to a flat frame.
A tight top plush feel built in four layers
The Chime Elite 2.0 keeps the pillow top look out of the equation and puts the plush feel into the foam stack itself. Starting at the surface, a micro cool technology cover works to keep heat from building up against the body, since a deep memory foam mattress like this one naturally traps more warmth than a hybrid.
Underneath, high density response memory foam handles the close, body hugging contour the Chime Elite 2.0 is known for, with a layer of Laytec foam worked into the comfort system for extra surface cushion. A supportive transition foam sits below that, keeping the mattress from feeling like it gives out under your hips, and a green tea infused base foam forms the foundation that carries the rest of the 14 inch build.
Because every layer here is foam, there is no coil bounce and very little motion transfer, a detail worth knowing on a bed this wide if you share it. The whole mattress is compatible with adjustable bases as well as a standard platform or solid foundation.
See the full Sierra Sleep lineup →Built for the side sleeper who wants to sink in
Side sleepers: this is the fit the Chime Elite 2.0 is built for. The high density memory foam and Laytec comfort layer cradle the shoulder and hip, the two pressure points side sleeping loads the most.
Back sleepers who prefer soft: the transition foam underneath keeps the surface from sagging in the middle, so you get the plush feel without your lower back losing support.
Combination sleepers: the tight top forgives a change in position, though the foam does need a moment to catch up each time you roll, worth noticing before you decide.
Couples sharing a California King: an all foam build with no coils keeps motion from one side reaching the other, so a partner getting up early is less likely to wake you.
Hot sleepers: the micro cool cover helps offset heat, but a deep foam comfort system like this one will still run warmer than a coil hybrid, worth comparing in person if temperature is your top concern.
Probably not for you if: you sleep on your stomach or you already know you want a firm, minimal sink mattress. The plush tight top here is the opposite of that feel; ask the showroom team about a firmer Sierra Sleep model instead.
Specifications
| Height | 14 in |
|---|---|
| Feel | Ultra Plush |
| Firmness | Ultra plush, the softest tier in the Sierra Sleep lineup |
| Construction | Micro cool technology cover over high density response memory foam and Laytec foam, a supportive transition foam, and a green tea infused base foam: 14 inches total. |
| Cooling | A micro cool technology cover is built to pull heat away from the surface, helping offset the warmth that comes with a deep memory foam comfort system. |
| Motion isolation | Excellent: the all foam, coil free build absorbs movement before it crosses the mattress, so a partner shifting on a California King is unlikely to wake you. |
| Warranty | 10 year non-prorated warranty |
Frequently asked questions
How firm is the Sierra Sleep 14 Inch Chime Elite 2.0?
It's built as an ultra plush, tight top mattress: the softest end of the Sierra Sleep range. High density response memory foam and Laytec foam create a deep, body hugging surface, with a transition foam underneath so you don't feel like you're sinking through to the base. If you already know you prefer a firm mattress, this is not the model to start with.
Is this a memory foam mattress or a hybrid?
All foam, no coils. The build layers a micro cool cover, high density response memory foam, Laytec foam, a supportive transition foam, and a green tea infused base foam across a full 14 inches. That foam only construction is why it stays quiet and why motion barely transfers across the bed.
Will this mattress sleep hot?
Deep memory foam mattresses generally run warmer than coil hybrids, and this one is no exception, though the micro cool technology cover is built to pull heat away from the surface and offset some of that warmth. If cooling is your top priority, ask the showroom team to compare it against a hybrid side by side.
What kind of base does the Chime Elite 2.0 need?
It's compatible with adjustable bases, and it also sits well on a platform bed or any solid foundation. A foundation or base is sold separately, so check what you already have before you order.
How long does it take to expand after unboxing?
Give it about 48 hours after you unbox it and set it on its foundation. Like most mattresses shipped compressed, it needs that time to fully expand and air out before it reaches its true feel.
Does the Chime Elite 2.0 come in other sizes?
Yes. This California King is the largest size Sierra Sleep builds this comfort feel in, and the same 14 inch Chime Elite 2.0 construction is also available in other standard sizes if California King isn't the right fit for your bedroom.
Can I try this mattress before I buy it?
There is no at-home trial on this Sierra Sleep mattress. What we offer instead is the showroom: come lie down on this exact Chime Elite 2.0 in your own sleeping position at one of our Kentucky locations before you decide. With a plush foam mattress like this one, a few minutes on the actual bed tells you more than any description can.
What's the warranty on this mattress?
It's backed by a 10 year non prorated warranty from Sierra Sleep, covering manufacturing defects for the full term with no prorated reduction in coverage as the years pass.
Can I see this mattress in person near me?
Yes, and with a plush mattress like this one, that's the smart way to decide. Mattress Overstock has showrooms across Kentucky where you can lie on this exact Chime Elite 2.0 in your own sleeping position before you commit.
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.
