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Nest Bedding Alexander Signature Series Mattress Review

The Alexander Signature Series Flippable is a mattress that offers two different sleeping surfaces on each side, making it one of the more adaptable mattresses that Nest Bedding offers.

On one side, the firmness level is medium (5), while the other side is firm (7). Both sides, however, are wrapped in an organic knit cotton cover, which is soft and breathable to keep you cool at night. The mattress contains a layer of gel-infused memory foam certified by  CertiPUR-US, as well as CoolFlow foam that’s designed to dispel body heat.

When it comes to size options, the mattress is available in queen, twin, twinXL, full, king, and California king. Below, we’ve compiled some stats on how the Signature Series compares with some of Nest Bedding’s other mattresses, including the Signature Hybrid and the All Latex.

Nest Bedding Mattresses At-A-Glance 

Nest Bedding Alexander Signature Series Flippable Nest Bedding Alexander Signature Hybrid Nest Bedding All Latex Mattress
Firmness Medium (5), Firm (7) Soft (3), Medium (5), Firm (7) Medium (4), Firm (7)
Mattress Type Foam Hybrid Latex
Height 13” 13.5” 9”
Price (Queen) $1,699 $1,599 $1,899

Nest Bedding Alexander Signature Series Mattress Review: Our Verdict

With its flippable construction as its most notable feature, the versatility of the Alexander Signature Series is where it shines. Whether you’re a combination sleeper who enjoys the options, unsure of what level of firmness is best for you, or looking for a guest bedroom mattress that can appeal to different types of sleepers, the Signature Series covers more bases than a single-surface mattress.

In most other areas, the mattress proves satisfactory, but not exceptional. Because of the thick memory foam comfort layer on the medium side, couples might appreciate the lack of motion transfer, but be turned off by the lack of bounce and edge support, which, respectively, hinders sex and limits the usability of the bed.

While sleepers of most sizes and preferred sleep positions are likely to find at least one of the sides serviceable, the mattress performs best with those under 130 pounds. This is because the medium side’s firmness combined with the all-foam construction is soft enough for preventing pressure points, while still firm enough to keep the spine aligned.

Choose the Alexander Signature Series if...
  • Your firmness preferences fluctuate from night to night
  • You’re unsure if a medium or firm mattress would be best for you
  • You weigh less than 130 pounds and prefer a medium firmness
  • You’re a side sleeper
Keep Shopping if...
  • You’re solely interested in either a medium or firm mattress
  • You want a mattress designed to stay cool
  • You’re especially sensitive to out-of-the-box new mattress odors

How Much Is the Alexander Signature Series Mattress?

In the flippable mattress market, the Signature Series is one of the mid-to-high priced options. It comes with a 100-night trial and several size options with relative pricing. While no add-ons or money-saving bundles are available, Nest Bedding does offer financing options through Affirm.

Sizes Dimensions Weight Price
Twin 38” x 75” x 13” 40 lbs. $1,049
Twin XL 38” x 80” x 13” 45 lbs. $1,249
Full 54” x 75” x 13” 50 lbs. $1,449
Queen 60” x 80” x 13” 65 lbs. $1,699
King 76” x 80” x 13” 85 lbs. $1,899
California King 72” x 84” x 13” 85 lbs. $1,899

How Does the Alexander Signature Series Mattress Feel?

Being flippable, the Alexander Signature Series offers two distinct feels, though each side shares a soft cotton cover and a layer of quilting foam. This top layer provides an immediate softness and breathability to both sides.

Since the mattress is completely foam and doesn’t contain springs, there isn’t a feeling of bounciness. Instead, you can expect the bed to hug your body and contour around it. By doing so, the bed can provide greater pressure relief than an innerspring mattress.

Naturally, the medium side will be the softer of the two, as it has gel memory foam beneath the quilting foam and a 2-inch transitional polyfoam layer. The firm side lacks the gel memory foam layer, making it less soft but more supportive.

What Is the Alexander Signature Series Mattress Made of?

Both sides of the Alexander Signature Series feature an organic cotton cover. On the inside, however, each side of the mattress features its own foam comfort layers that provide a unique firmness level and feel.

Cover Material

The Signature Series has a completely organic cotton cover. Cotton is a soft and breathable material. The breathability helps to prevent moisture buildup and maintain a cool surface. The cover is unable to be removed for cleaning, however.

Comfort Layers

Both sides of the mattress have a comfort layer of CoolFlow plush quilting foam, which is intended to help prevent the buildup of body heat. The softer side has an extra comfort layer, however, in the form of gel memory foam, which is designed to prevent heat buildup. It also provides pressure relief by contouring closely to the body.

Transition Layer

The medium side features a polyfoam transitional layer that’s meant to provide an additional buffer between the sleeper and the mattress’ support core.

Support Core

The support core of the Signature Series is 7 inches of high-density base foam. The firm side is more influenced by the support core, as there’s only 1 inch of comfort foam between it and the sleeper, which contributes to its firmness.

Does It Isolate Motion?

Rating: 4/5 (Medium Side), 2/5 (Firm Side)

Due to the mattress’ lack of springs and reliance on high-density polyfoam for support, the Signature Series does a great job of isolating motion on its medium side, since its memory foam comfort layer absorbs motion and isolates it within a single area. On the firm side, it doesn’t perform nearly as well, since the thin polyfoam comfort layer over the firm support core doesn’t prevent motion transfer as well as the thick memory foam on the other side.

Does It Sleep Cool?

Rating: 3/5 (Medium Side), 4/5 (Firm Side)

The mattress is encased in an organic cotton cover and both sides feature 1 inch of CoolFlow foam, both of which contribute to the mattress maintaining a somewhat cool surface during sleep. Since the firmer side doesn’t conform as much around the body and allows for more airflow, it makes for a slightly cooler surface.

Will It Sag Along the Edges?

Rating: 2/5 (Medium Side), 3/5 (Firm Side)

Foam mattresses tend to have trouble with edge support, and the Signature Series is no different. As you get to the edge of a foam mattress, it becomes less capable of holding weight, unlike an innerspring mattress.

Naturally, the firm side of the Signature Series Flippable is able to offer more edge support than its medium side,because of its lack of a thick comfort system.

Is It Good for Sex?

Rating: 3/5 (Medium Side), 4/5 (Firm Side)

As for sex, the Signature Series is a fair option. Since it doesn’t have springs, the mattress isn’t conducive to much overall movement and thereby fails to provide the bounce couples might be looking for. That said, the firm side is much more responsive and allows for a greater ease of movement, due to the lack of the more inhibitive comfort layers.

What About Off-Gassing?

Rating: 2/5

Like many foam mattresses, the Signature Series is likely to come out of the box with a strong smell. Certain organic compounds used in the production of foam emit an odor that can last from a few hours to a few days. However, the mattress is made with CertiPUR-US foam, which ensures the smell is non-toxic.

What Type of Sleeper Is the Alexander Signature Series Mattress Best for?

The Alexander Signature Series caters to a wider variety of sleepers than normal, thanks to its two sides. While side sleepers aren’t likely to enjoy the firm side, the medium (6) side provides more of the cushioning they require.

Back and stomach sleepers, on the other hand, will likely prefer the firm side, considering that a firmer surface prevents the abdomen from sinking too much and causing strain on the back.

Side Sleepers: Since sleeping on your side applies more pressure on your shoulder and hips, a medium to medium firm mattress that allows for a lot of contouring is ideal. Therefore, the medium side of the Signature Series would be most appealing to a side sleeper – especially those who weigh 230 pounds or less.

Combination Sleepers: Due to the medium and firm sides of the mattress, most sleepers who alternate between their backs, stomachs, and sides are most likely to prefer the medium side, given its middle-of-the-road firmness. Combination sleepers over 230 pounds, however, will likely prefer the firm side and its more robust support.

Back Sleepers: It’s important for back sleepers to receive proper lumbar support, which means they shouldn’t sleep on a mattress that’s too soft. However, a mattress that’s too firm won’t provide proper cushioning for the lumbar area. Therefore, both sides of the Signature Series are likely to keep back sleepers satisfied, with lighter sleepers preferring the medium side and heavier sleepers generally preferring the firm side.

Stomach Sleepers: Much like back sleepers, stomach sleepers are in need of proper lumbar support and cushioning, but are more likely to prefer the firm side. This is because stomach sleepers are more prone to sinkage around the midsection, where most people tend to carry more weight, and so they often need extra support. All-foam construction isn’t ideal for stomach sleepers, as hybrid mattresses tend to provide stronger support for preventing hips from sinking too far into the mattress.

How Does Body Weight Impact the Alexander Signature Series Mattress' Performance?

A sleeper’s weight has a lot to do with how a mattress will feel for them. Those over 230 pounds are less likely to feel comfortable on a soft mattress, due since they need more support to keep their spines properly aligned. Those under 130 pounds are more likely to experience pressure points on a firm mattress.

Due to the dual nature of the Signature Series, its comfort ratings vary. While it comes up as good or fair for most weights and sleeper types, there are some exceptions worth noting.

Those under 130 pounds are likely to prefer the medium side, since its thick comfort system provides ample cushioning to prevent pressure buildup in areas such as the hips and shoulders.

The only area where the mattress comes up short is with side sleepers under 130 pounds on the firm side. Since these types of sleepers don’t sink as much and the surface is firm, the pressure on their shoulders and hips will likely result in an uncomfortable sleep.

Is It Good for Couples?

Overall, the Alexander Signature Series should be a decent mattress for couples. Its memory foam comfort layer on the medium side prevents motion transfer, so there’s less worry of couples waking each other up, though this isn’t the case for those who choose to use the firm side.

With the cotton cover and the CoolFlow layer of foam, the mattress should do a fair job of regulating temperature. For couples that value temperature regulation above all else, it would be better to get a hybrid mattress, as they are more conducive to airflow than all-foam models. Nest Bedding’s Organic All Latex Mattress is particularly good for keeping cool at night.

On the downside, the lack of edge support on the medium side means there’s less sleeping space for two people. On the firm side, this isn’t as much of an issue.

Trial, Warranty, and Shipping Policies

Availability The Alexander Signature Series is available to customers in the United States and Canada. In addition to online, the mattress can be bought in stores.
Shipping The Signatures Series can be shipped to Canada and the United States, including Hawaii and Alaska. It will ship in a reinforced box and several layers of plastic.

Since the mattress is made to order, it can take up to a few weeks to arrive. Shipping is free to the contiguous United States and no assembly is required.

Additional Services White Glove delivery is available, but it costs extra and you must ask for it by calling one of Nest Bedding’s stores.
Sleep Trial The Signature Series does come with a 100-night sleep trial. If returned, a refund is provided, unless the mattress is returned within 30 days. Should that be the case, there is a 25% restocking fee.

If you decide to return your mattress, Nest Bedding allows for it to be donated to a charity of your choosing.

Warranty As with all Nest Bedding products, the Signature Series comes with a limited lifetime warranty. While lasting forever for the original owner of the mattress, the warranty only covers certain defects.

The qualifying defects include visible foam sag greater than 1 inch, manufacturing flaws in the cover’s zipper, and physical flaws in the construction of the cover.