Sierra Sleep by Ashley
Sierra Sleep Terra Sleep Soft Mattress
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The Terra Sleep Soft is the plushest bed in Sierra Sleep's Terra Sleep line, built for side sleepers and lighter to average body types who want a mattress that cushions the shoulder and hip first and supports second. If a firm bed has ever left you feeling like you were sleeping on top of a table, this is the softer, more contouring answer.
The build
This is the Terra Sleep Soft, Ashley model M524, a 14 inch hybrid that pairs a natural latex comfort layer with a wrapped coil base. The cover is a four way stretch knit made with REPREVE, a recycled fiber, so the surface feels soft against skin and breathes rather than trapping heat. Under the cover sits a FSC Certified Natural Talalay latex layer, a natural rubber material chosen for its cushioning and its ability to pull heat away from the body, so the plush feel does not turn into a warm one. Below the latex is a power packed wrapped coil support unit with Ashley Edge technology reinforcing the perimeter, which keeps the edges from collapsing when you sit down to get dressed or sleep near the side of the bed. A base layer of support foam sits under the coils to keep the whole system stable over time.
Feel and support
Lie down and the first impression is give: the latex layer lets your shoulders and hips sink in before the coils pick up the support underneath. Because the coils are individually wrapped, that support responds to your body rather than pushing back all at once, and Ashley's Edge technology keeps the perimeter from feeling like a cliff edge when you sit or sleep near it. Movement across wrapped coils is also reduced compared to an open coil system, so a partner shifting or getting up in the night is less likely to wake you. The mattress pairs with an adjustable base if you want to raise your head or feet, and it ships compressed in a box, taking a day or two to fully expand and reach its final feel once it is unpacked.
Who it suits
- Side sleepers who want cushioning at the shoulder and hip with support underneath
- Lighter and average body types who do not need a firm surface to stay supported
- Back sleepers who like a plush top as long as they do not need extra lumbar support
- Couples who want reduced motion transfer from a hybrid rather than an all foam bed
Stomach sleepers and anyone who needs firmer lower back support should look at a firmer mattress within the Terra Sleep line, such as the Terra Sleep Medium or the Terra Sleep Firm, rather than the Soft. Heavier sleepers who tend to sink past a comfort layer into the coils below may also prefer more support than this model is built to give.
The only way to know how a soft hybrid feels under your own body is to lie on it. Come stretch out on the Terra Sleep Soft at one of our Kentucky showrooms and feel the difference between reading about latex and coils and actually sleeping on them.
What makes this mattress different
Plush Natural Talalay latex comfort layer
A FSC Certified Natural Talalay latex layer, made from natural rubber, cushions the shoulder and hip while pulling heat away from the body instead of trapping it.
REPREVE knit cover
A four way stretch knit cover made with REPREVE, a recycled fiber, keeps the sleep surface soft and breathable.
Wrapped coil support with Ashley Edge technology
A power packed wrapped coil support unit reinforced at the perimeter with Ashley Edge technology holds up the plush comfort layer and keeps the edge of the bed from sagging when you sit down.
Reduced motion transfer
Individually wrapped coils respond to your body and absorb movement at the source, so a partner turning over or getting up is less likely to disturb your side of the bed.
Stable base foam layer
A base layer of support foam sits beneath the coil system, keeping the mattress even and stable over time.
14 inch profile
At 14 inches, the Terra Sleep Soft has the depth for a genuinely plush feel while still fitting standard sheets and most bed frames.
Adjustable base compatible
Works with an adjustable base if you want to raise your head or feet, or lies flat on a standard platform or foundation.
10-year non-prorated warranty
Backed by Ashley's 10-year non-prorated warranty against manufacturing defects.
A plush latex top over a supportive wrapped coil base
The Terra Sleep Soft runs the opposite build from Sierra Sleep's firmer models: a deep, plush comfort layer sits on top instead of a shallow one, so it cushions your shoulders and hips before the coils below start supporting you. From the top down, the build goes a four way stretch knit cover made with REPREVE recycled fiber, then a FSC Certified Natural Talalay latex layer for cushioning and temperature regulation, then a power packed wrapped coil support unit reinforced at the perimeter with Ashley Edge technology, then a base layer of support foam that keeps the whole 14 inch mattress stable over time.
Because the coils are individually wrapped rather than tied together, they respond to your body one at a time, which is what gives this bed both its plush give and its reduced motion transfer between sides of the bed. If Soft is more give than you want, the Terra Sleep Medium and Terra Sleep Firm use the same coil and cover system with a firmer comfort layer on top.
See the full Sierra Sleep lineup →Built for the side sleeper who wants real cushioning
Side sleepers: this is the position the Terra Sleep Soft is built for. The latex comfort layer cushions the shoulder and hip so they can sink in instead of resting directly on the coils.
Lighter and average body types: at these weights the comfort layer does its full job, cushioning before you settle down into the coil system, so the plush feel stays plush.
Back sleepers who like a soft top: you'll get the same cushioned feel, though if your lower back needs firmer support underneath, the Terra Sleep Medium is closer to what you likely want.
Couples sharing a bed: individually wrapped coils keep movement on one side of the mattress from carrying to the other, so a partner turning over or getting up is less likely to wake you.
Adjustable base users: the hybrid build is compatible with an adjustable frame, so it works if you like to raise your head or feet.
Probably not for you if: you sleep on your stomach or you're a heavier sleeper who needs firmer support to stay lifted. Both groups tend to sink past the comfort layer into the coils on a soft bed like this one; see the Terra Sleep Firm instead.
Specifications
| Height | 14" |
|---|---|
| Feel | Soft |
| Firmness | Soft: plush contouring latex comfort layer over full coil support |
| Construction | REPREVE knit cover, FSC Certified Natural Talalay latex comfort layer, wrapped coil support unit with Ashley Edge technology, and a base foam layer, 14 inches total |
| Cooling | Natural Talalay latex is chosen for temperature regulation and pairs with a breathable REPREVE knit cover, so the plush feel doesn't sleep hot |
| Motion isolation | Individually wrapped coils reinforced with Ashley Edge technology reduce motion transfer between sides of the bed |
| Warranty | 10-year non-prorated warranty from Ashley |
Frequently asked questions
How soft is the Terra Sleep Soft?
It's the plushest model in Sierra Sleep's Terra Sleep line. A Natural Talalay latex comfort layer lets your shoulders and hips sink in before the wrapped coil system underneath takes over, so it's a cushioned, contouring feel rather than a firm, sleep on top of it feel.
Who is this mattress best for?
Side sleepers get the most out of it, since the latex layer cushions the shoulder and hip directly. Lighter and average body types also do well on it, since the comfort layer has enough give for their weight before the coils take over. Stomach sleepers and heavier sleepers who need firmer support should look at the Terra Sleep Firm instead.
Is the Terra Sleep Soft memory foam or a hybrid?
It's a hybrid. A Natural Talalay latex layer sits on top for cushioning, and a wrapped coil support unit with Ashley Edge technology sits underneath for support and airflow, which gives it the contouring feel of memory foam with the responsiveness of an innerspring.
Does it sleep hot?
It shouldn't. The comfort layer is Natural Talalay latex, which is chosen for temperature regulation, and the cover is a four way stretch knit made with REPREVE for breathability. Between the two, heat has somewhere to go instead of building up under you.
How is motion transfer on a shared bed?
Better than an open coil mattress. The wrapped coils move independently of each other, so movement on one side of the bed is less likely to carry across to a partner on the other side.
What size options are available?
Queen, King, and California King. There is no Twin or Full option in this model.
Can I use it with an adjustable base?
Yes. The Terra Sleep Soft is compatible with an adjustable base if you want to raise your head or feet, and it also sits flat on a standard platform or foundation.
What is the warranty?
Ashley backs the Terra Sleep Soft with a 10-year non-prorated warranty against manufacturing defects.
Is there an at-home trial with this mattress?
No. Sierra Sleep beds do not come with an at-home trial period. The way to know how the Terra Sleep Soft feels is to lie on it at one of our Kentucky showrooms before you buy, in your own sleeping position, for as long as you need.
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.
