Idle Gel Foam Mattress Review

Gel Foam

Idle Gel foam
Materials Foam
Firmness Medium Firm (6)
Sleep Trial 18 months (30-night requirement)
Warranty Lifetime, limited
Price (queen) $1,390

Founded in 2017, Idle Sleep first became known for its Idle Hybrid mattress. The company now offers a full range of sleep accessories and mattresses, including the Idle Latex, Idle Gel Plush, and Idle Gel Foam. This review will look at the Idle Gel Foam, an affordable all-foam mattress that also goes by the name ‘The Idle.’

The Idle is composed of a layer of proprietary Buoyancy foam over an aerated transitional foam layer and a high-density polyfoam support core. The cover is breathable, designed to keep the surface of the mattress cool. The Idle stands at 12 inches tall and has a medium firm feel, with wide appeal for different sleeper types.

If you’re having trouble narrowing down your choices between the different Idle mattresses, look no further. We will provide in-depth information on specs, sleeper ratings, pricing, and other practical details, as well as take a quick look at how The Idle compares to the other Idle Sleep mattresses.


Idle Sleep Mattresses At-A-Glance
Gel Foam Gel Plush Idle Hybrid Idle Latex
Firmness Medium Firm (6) Medium (5) Medium Firm (6), Firm (8) Medium Firm (6), Firm (8)
Material Type Foam Foam Hybrid Hybrid
Height 12" 14" 14" 14"
Price (queen) $1,390 $1,990 $1,856 $2,570
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Idle Gel Foam Mattress Review: Our Verdict

Sold at an attractive price-point, the Idle is a solidly built mattress with a number of reasons to recommend it. Its medium firm feel is appropriate for practically all body types and sleeping positions, and the mattress also performs well on heat retention compared to other all-foam models.

For couples, The Idle offers strong motion isolation and a noiseless construction to cut down on nighttime disruptions. Thanks to the bed’s reliable edge support, each partner should have plenty of room to spread out.

While the Idle Gel Foam has many advantages, Idle also offers several other models with a more specialized feel. Idle offers an 18-month long sleep trial, which is much longer than usual and gives shoppers plenty of time to find the right Idle mattress for their sleeping style.

Sleepers who need deep pressure relief or above-average motion isolation can opt for the Idle Gel Plush, a thicker, plusher all-foam model. Meanwhile, the Idle Hybrid and Idle Latex both offer standout edge support, temperature neutrality, and a choice of two firmness levels. These options may be ideal for those who like to personalize the feel of their mattress.

Choose The Idle Mattress if…

  • You’re looking for a neutral, all-round mattress that suits a variety of sleeping styles
  • You need strong pressure relief without sacrificing support
  • You wake easily from your partner’s movements
  • You’d like an affordably priced mattress with a generous sleep trial

Keep Shopping if…

  • You often switch sleeping positions
  • You prefer a bouncier mattress for sex
  • You want a very firm or very soft mattress

How Much Is the Idle Gel Foam Mattress?

The Idle Gel Foam is Idle’s most budget-friendly mattress. All-foam mattresses often have lower price-points than other types due to their simpler construction. However, the Idle Gel Foam is a bargain even compared to similar competing models. Idle Sleep also offers regular discounts and bundled accessories such as pillows.

The mattress is available in all the standard mattress sizes.

Gel Foam

Sizes Dimensions Weight Price
Twin 38" x 75" N/A $910
Twin XL 38" x 80" N/A $990
Full 54" x 75" N/A $1,190
Queen 60" x 80" N/A $1,390
King 76" x 80" N/A $1,710
California King 72" x 84" N/A $1,710
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What Is the Idle Sleep Gel Foam Mattress Made of?

The Idle has a straightforward all-foam construction consisting of a quilted cover, two foam comfort layers, and a high-density polyfoam base.

In total, the mattress measures 12 inches tall. This is within the standard range for a mattress, though it’s a little thicker than most all-foam mattresses. The extra two inches provide room for a more substantial comfort layer section, allowing the mattress to accommodate heavier sleepers without the mattress bottoming out.

Cover Material

The cover is made with breathable quilted polyester. It has a zip that allows both the top and bottom covers to be removed and washed. Below the top cover is a chemical-free fire barrier made with natural cotton.

Comfort Layers

The primary comfort layer consists of 3 inches of cooling Buoyancy polyfoam. This proprietary foam is intended to mimic the pressure-relieving capabilities of memory foam, but with a quicker response time. The foam has gel infusions designed to pull heat away from the sleeper. This layer is followed by a firmer 2-inch layer of polyfoam that acts as a transition to the support core. The polyfoam is aerated with tiny holes to increase ventilation and help maintain a neutral temperature.

Support Core

The support core consists of 7 inches of high-density polyfoam. Idle Sleep uses a denser polyfoam than most other brands, giving the mattress structure and durable support that should stand up well to long-term use.

Does it Isolate Motion?

Rating 4/5

The Idle Gel Foam reduces motion transfer to a significant extent. This is a common virtue of all-foam mattresses, which lack the excessive bounciness of latex or innerspring coils.

While the top layer of The Idle mattress is somewhat responsive, it still conforms closely enough to keep motion localized to the immediate area around the sleeper. The transitional layer and the dense polyfoam base help absorb most of the remaining movement.

A mattress that transfers movement across the surface of the bed can cause disturbances to a sleeping partner. Due to its ability to limit motion transfer, the Idle Gel Foam is a good choice for sensitive sleepers who share the bed.

Does it Sleep Cool?

Rating 3/5

Compared with other all-foam mattresses, the Idle sleeps relatively cool. Mattresses with solid constructions leave little room for airflow, which can sometimes lead to excessive heat retention. However, the Idle’s breathable cover, gel infusions, and aerated polyfoam help boost airflow throughout the mattress. This model is a good option for hot sleepers who prefer the feel of an all-foam bed.

Will It Sag Along the Edges?

Rating 3/5

Edge support is fairly reliable in the Idle Gel Foam mattress. This is largely thanks to the medium firm surface, which doesn’t compress as much as a softer mattress. The dense polyfoam base also kicks in to prevent sleepers from sinking down too much around the perimeter of the bed.

Most people should be able to sleep near the edge of the mattress without feelings of roll-off. Sleepers who weigh less than 230 pounds may also find that the mattress supports sitting on the edge without too much sagging. However, those who spend large amounts of time sitting on the edge of the bed, or those who need a little extra support when getting in and out of bed, may prefer an innerspring or hybrid mattress with reinforced edges.

Is It Good for Sex?

Rating 2/5

Couples may find that The Idle lacks responsiveness for sex. The Buoyancy foam boasts a faster response time than traditional memory foam, but it’s not as bouncy as other mattresses. This may hamper movement and make it difficult to adopt different positions.

Benefits of The Idle for sex include its quiet construction and the traction provided by the foam comfort layers. Most couples should also feel relatively stable near the edges of the mattress, although The Idle doesn’t offer the superior edge support of a hybrid or innerspring model.

What About Off-gassing?

Rating 3/5

The Idle Gel Foam mattress may emit a faint odor when it is first unboxed. This occurs as a result of volatile organic compounds (VOCs) being released into the air. It’s nothing to worry about, and the smell should go away within a few days in a well-ventilated room. All of the foams used in the Idle mattress have CertiPUR-US certification that guarantees them to be free of harmful chemicals.

What Type of Sleeper is the Idle Sleep Gel Foam Mattress Best For?

Sleepers should feel comfortable in any sleeping position on the Idle Gel Foam mattress. It is particularly well-adapted to the needs of side and back sleepers between 130 and 230 pounds.

Side Sleepers

The Idle is ideally constructed for side sleepers between 130 and 230 pounds. For these sleepers, contouring foams cushion the hips and shoulders to reduce pressure points and encourage proper spinal alignment. Side sleepers who weigh less than 130 pounds or more than 230 pounds may experience some slight pressure build-up. While the Idle Gel Foam is suitable for these sleepers, the Idle Gel Plush adds an extra dimension of pressure relief for those with  severe pressure points.

Combination Sleepers

The Idle Sleep Gel Foam mattress provides adequate support and pressure relief when sleeping on the side, back, and stomach. However, combination sleepers may have some trouble switching positions on the Idle Sleep Gel Foam mattress. The Idle Hybrid or Idle Latex mattresses may be better-suited to people who tend to change positions often.

Back Sleepers

Back sleeping naturally aligns the spine and is generally considered the best sleeping position. However, back sleepers are vulnerable to pressure build-up in the lower back, especially on mattresses that lack lumbar support. The Idle prevents this problem by contouring to fit the small of the back, while keeping the rest of the back supported with the high-density polyfoam core. Back sleepers of all body types, especially those between 130 and 230 pounds, should receive sufficient support and pressure relief from the mattress.

Stomach Sleepers

Stomach Sleepers typically need robust support from their mattress to prevent their midsections from sinking too deeply, which throws off spinal alignment. Sleepers of all weight groups will receive adequate support from The Idle, though some may experience some slight sinkage around the midsection.

How Does Body Weight Impact Performance?

The Idle is best described as medium firm, but this rating may change depending on the sleeper’s body type. Sleepers under 130 pounds generally experience mattresses as firmer, while those over 230 pounds often find them subjectively softer.

Individuals who weigh less than 130 pounds exert minimal pressure on the mattress. These sleepers receive looser contouring, though the mattress still provides ample pressure relief for side sleepers. Likewise, back and stomach sleepers are fully supported by the relatively firm foams.

The Idle Gel Foam performs best for individuals who weigh between 130 and 230 pounds. For these sleepers, the comfort layers form a pressure-relieving cradle, finding a happy medium between support and pressure relief. Stomach sleepers may experience some slight sagging in the hips, but this shouldn’t be an issue for most people.

The Idle garners surprisingly positive ratings from testers over 230 pounds. Many all-foam models struggle to provide enough support for these sleepers, but the extra transitional layer and high-density polyfoam base help this mattress succeed where others do not. The surface of the mattress is firm enough to prevent excessive sinkage, even for stomach sleepers. While perhaps not as ideal as a hybrid mattress, the Idle Gel Foam is nevertheless a good choice for people over 230 pounds who prefer an all-foam model.

Is The Idle Mattress Good for Couples?

The Idle Gel Foam Mattress has several advantages for couples. Most notable is the mattress’s ability to isolate motion transfer, allowing each person to sleep soundly even if the other person frequently shifts positions. The Idle also has decent edge support, so both partners can use their full side of the bed. Its cooling features help curb heat retention for couples where one or both partners sleeps hot.

Another benefit of the mattress is that it adapts well to most sleeping positions, regardless of body type. Couples with different preferences often have trouble finding a mattress that works for both of them, so this is encouraging news.

The major drawback is the Idle Gel Foam’s lack of responsiveness, which may inhibit movement for combination sleepers as well as being a hindrance for sex. Couples will have to weigh what features are most important to them before deciding.

Idle Sleep’s Trial, Warranty, and Shipping Policies


The Idle Gel Foam mattress is only sold to customers in the contiguous U.S. It can be purchased exclusively through the Idle website.


Shipping is free in the contiguous U.S. The Idle is shipped as a bed-in-a-box via UPS Ground, and orders usually arrive within 4 to 10 business days.

Customers should place the mattress on the foundation and carefully remove the box and plastic layers. The mattress will expand almost immediately but may take a few days to regain its full size.

Additional Services

Idle Sleep offers White Glove delivery for an extra charge. For those who order this service, a third-party delivery crew will contact the customer directly to arrange a delivery date and come set up the mattress. White Glove customers can also arrange for old mattress removal at the time of delivery.

Sleep Trial

Customers have a full 18 months to try out The Idle. After the first 30 nights, those who find it’s not for them can return the mattress for a full refund. Idle Sleep will arrange for pickup and responsible disposal of the mattress at no charge to the customer. White Glove and old mattress removal fees are non-refundable.

Those who prefer to exchange their mattress for another one can do so. Idle Sleep asks for a $300 restocking fee for the exchanged mattress. If customers prefer, they can choose not to pay this fee, but instead waive the sleep trial on the second mattress.


All Idle mattresses come with a limited lifetime warranty against manufacturing and workmanship defects. The warranty covers body impressions of at least 0.5 inch. At its discretion, Idle Sleep will provide a repair or replacement for mattresses that it deems defective. Warranties are only valid for the original purchaser of a new Idle mattress from an authorized source. Mattresses that have been used without a supportive foundation are not covered under the warranty terms.

Repaired or replacement mattresses fall under the umbrella of the original warranty. In lieu of a replacement in the same style, customers may choose to purchase an upgrade to a different model to replace the defective mattress. In this case, the mattress would come with its own new warranty.