Sierra Sleep by Ashley
Sierra Sleep Augusta2 Mattress
Couldn't load pickup availability
The Augusta2 is for the sleeper who wants a firm, no-nonsense surface with just enough padding on top to keep it from feeling like a slab. If your back has been telling you the last mattress was too soft, this one answers that complaint directly.
How It's Built
Ashley builds the Augusta2 (model M525) as a hybrid, layering foam over a wrapped coil system. On top sits 1.5 inches of firm convoluted quilt foam and 2 inches of firm support foam, forming the Euro pillow top: a foam layer sewn flush with the surface rather than stitched on as a separate cushion, so the firmness underneath still comes through. Below that, a half inch of gel memory lumbar support foam adds targeted give through the lower back and helps pull heat away from the body. A high-density base foam layer sits over the wrapped coil core, and a foam encasement wraps the whole unit for edge stability. At roughly 12 inches total, it holds the profile of a real mattress without the bulk of an 18-inch bed.
Wrapped coils compress independently, so the support responds to where your body actually presses down instead of moving as one connected unit. That also means less of a partner's movement travels across to your side of the bed. Ashley backs the Augusta2 with a 10-year non-prorated warranty, though that coverage depends on the outer cover staying zipped and intact.
Feel and Support
This is a firm mattress, not a firm-leaning-medium. Back and stomach sleepers get a stable, level surface that resists sinking at the hips, which is exactly what those positions need to keep a spine from bowing overnight. Side sleepers who already prefer firmer beds will find the Euro pillow top gives just enough at the shoulder and hip to take the hardest edge off, without turning the mattress soft. The wrapped coil base also plays well with adjustable frames, so raising the head or feet doesn't fight the construction underneath.
Who Should Skip It
If you're a dedicated side sleeper who wants real cradling, or you've been shopping for a plush or pillow-soft feel, the Augusta2's firmness will read as too hard. Ashley builds softer options in the same Sierra Sleep line if that's closer to what you're after.
Cover and Care
The cover is a luxury nano stain-resistant, waterproof finish that doubles as a bed bug, dust mite, and allergen barrier, which makes day-to-day upkeep simpler over the years you own it. Like most mattresses shipped in a box, the Augusta2 arrives compressed and rolled; plan on about 48 hours after unboxing for it to fully expand to its true firmness.
- Twin
- Full
- Queen
- King
Series: Augusta2 (Ashley model M525). The best way to know if a firm bed is your firm bed is to lie down on this exact mattress at one of our Kentucky showrooms before you buy.
What makes this mattress different
A genuinely firm surface
Firm convoluted quilt foam and firm support foam sit right at the top, so the Augusta2 reads as a true firm bed instead of a medium wearing a firm label.
Gel memory lumbar support
A half inch of gel memory lumbar foam adds targeted give right where the lower back needs it, and helps pull heat away from that layer of the mattress.
Wrapped coil core
Individually wrapped coils respond to where your body actually presses down, so support follows your shape and less motion carries across to a partner's side of the bed.
Euro pillow top, still firm
The quilt foam is sewn flush with the surface rather than added as a separate soft topper, which is why the Augusta2 keeps its firm support even with a finished, tailored look on top.
Stain-resistant protective cover
A luxury nano stain-resistant, waterproof cover doubles as a bed bug, dust mite, and allergen barrier, with a concealed zipper for a cleaner, more durable finish.
10-year non-prorated warranty
Ashley backs the Augusta2 with a full 10-year non-prorated warranty, though that coverage requires the outer cover to stay zipped and intact.
Adjustable base compatible
The wrapped coil construction works with adjustable frames, so raising the head or feet does not fight against the mattress underneath.
Ready in about 48 hours
Like most mattress-in-a-box builds, the Augusta2 ships compressed and rolled and needs roughly two days after unboxing to fully expand to its true firmness.
Firm foam on top, wrapped coils underneath
The Augusta2 (Ashley model M525) starts with 1.5 inches of firm convoluted quilt foam and 2 inches of firm support foam at the surface, forming the Euro pillow top. That foam is sewn flush with the mattress rather than stitched on as a separate cushion, which is why the top still feels firm instead of turning soft the way a padded pillow top usually does.
Below that sits a half inch of gel memory lumbar support foam, positioned to add a little give through the lower back and pull heat away from that section of the bed. A high-density base foam layer comes next, resting over a wrapped coil support core, with a foam encasement wrapping the perimeter for edge stability. The coils compress independently rather than as one connected unit, so the mattress responds to your body's shape and limits how much movement travels across to the other side of the bed.
The whole build lands at about 12 inches, the profile of a proper mattress without extra bulk, and it is finished with a luxury nano stain-resistant, waterproof cover that also works as a bed bug, dust mite, and allergen barrier.
See the full Sierra Sleep lineup →Built for the back and stomach sleeper who wants firm and means it
Back sleepers: firm support keeps the hips from dipping and the spine level, which is the setup most back sleepers rest best on.
Stomach sleepers: this is the position that needs firm the most. A softer bed lets the hips sag and the lower back arch; the Augusta2 keeps you level instead.
Side sleepers who already like it firm: the Euro pillow top gives just enough at the shoulder and hip to take the hardest edge off, without the mattress ever reading as soft.
Couples on a shared bed: wrapped coils compress on their own, so a partner shifting or getting up early is less likely to travel across and wake you.
Adjustable base owners: the coil construction is built to bend with an adjustable frame instead of fighting it.
Probably not for you if: you are a dedicated side sleeper who wants a deep cradle, or you have been shopping for a plush or pillow-soft feel. This mattress will read as too firm for that.
Specifications
| Height | 12 in |
|---|---|
| Feel | Firm |
| Firmness | Firm, a genuinely firm feel rather than a medium marketed as firm |
| Construction | Firm convoluted quilt foam and firm support foam Euro pillow top over gel memory lumbar support foam, a high-density base foam layer, and a wrapped coil support core with a foam encasement perimeter. About 12 inches total. |
| Cooling | Gel memory lumbar support foam is built to pull heat away from the lower back section of the mattress, and the wrapped coil core allows more airflow than an all-foam build. |
| Motion isolation | Good. Wrapped coils compress independently rather than as one connected unit, so a partner shifting or getting up is less likely to travel across the bed. |
| Warranty | 10-year non-prorated limited warranty, contingent on the outer cover staying zipped and intact. |
Frequently asked questions
How firm is the Sierra Sleep Augusta2?
Genuinely firm. The quilt foam and support foam at the top are built firm on purpose, so this is not a medium mattress marketed as firm. If you have been sleeping on a soft bed and your back has been complaining, this is the kind of support that answers that directly.
Is the Augusta2 a hybrid or an all-foam mattress?
It is a hybrid. Layered foam, including a Euro pillow top and a gel memory lumbar foam section, sits over a wrapped coil support core, so you get the firm surface of foam with the responsiveness of coils underneath.
Who sleeps best on the Augusta2?
Back and stomach sleepers benefit most, since firm support keeps the hips from sinking and the spine level in both positions. Side sleepers who already prefer a firmer bed will also find enough give in the Euro pillow top to cushion the shoulder and hip.
Does the Augusta2 sleep hot?
It should not. The gel memory lumbar support foam is built to pull heat away from that section of the mattress, and the wrapped coil core underneath allows more airflow than an all-foam build would.
How much motion transfer will I feel from a partner?
Less than a basic innerspring. The wrapped coils compress on their own instead of as one connected unit, so a partner shifting, getting up, or coming to bed late is less likely to travel across and wake you.
Can I use the Augusta2 on an adjustable base?
Yes. The wrapped coil construction is built to flex with an adjustable frame, so raising the head or feet does not fight against the mattress. Give it about 48 hours after unboxing to fully expand before you judge the feel on any base.
Is there an at-home trial with the Augusta2?
No. Sierra Sleep beds, including the Augusta2, do not come with an at-home trial. The way to know if this firm hybrid is right for you is to lie down on it in your own sleep position at one of our Kentucky showrooms before you buy.
Can I see this mattress in person near me?
Yes, and with a firm mattress that is especially worth doing, since firm means something a little different to everyone. Mattress Overstock is a Kentucky-owned company with showrooms in Lexington, Georgetown, Somerset, London, and Richmond. Come lie on the Augusta2 in your own sleeping position, and since everyone on our 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.
