Sleep Number Classic Series Mattress Review
Sleep Number is among the most well-known mattress manufacturers, and their 360 Smart Beds Classic series demonstrates why many customers are loyal to the brand. Consisting of two models — the C2 and C4 — with slightly different firmness ranges and construction, the Classic series offers sleepers an adjustable airbed at an affordable price point.
Both the C2 and C4 models have a dual-air chamber support core. These can be adjusted to have different firmness levels by adding or removing air at the touch of a button. However, the more affordable Classic series does not have the wide range of the other mattresses in the 360 Smart Beds collection, like the Performance and Innovation series.
The C2 has a 2-inch comfort layer of gel-infused polyfoam and a rayon-blend cover, while the pricier C4 features a 3-inch layer of gel-infused polyfoam and uses a polyester-blend cover. This slight difference in construction gives the C2 a firmness range of approximately medium firm to firm, while the C4 ranges from medium to firm.
As part of the Sleep Number’s 360 Smart Beds collection, the Classic series also features integrated SleepIQ sleep tracking technology.
We’ll walk you through everything you should know before buying a Sleep Number mattress. In addition to who the Classic series is best for and how both models perform under real-life conditions, we’ll go into detail on their construction, the company’s policies, and more.
Sleep Number Mattresses At-A-Glance
|Firmness||Adjustable - Soft (3) to Firm (8)||Adjustable - Soft (3) to Firm (8)||Adjustable - Soft (3) to Firm (8)|
Sleep Number Classic Series Mattress Review: Our Verdict
Overall, we believe both mattresses in the Classic series — the C2 and C4 — are capable of offering both comfort and support to a wide range of sleepers. With adjustable firmness levels and balanced construction, both models have excellent appeal across both weight and preferred sleep position categories.
However, the mattresses are not identical. The C2 is less expensive than the C4, with a firmer feel and a thinner comfort layer. The C4, then, tends to be slightly softer and has a wider range of adjustment, as well as more support for sleepers over 130 pounds. It is also significantly more expensive than the C2, which is the least expensive of Sleep Number’s sleep-tracking 360 Smart collection.
Choose The Sleep Number Classic Series if…
- You’re looking for an adjustable firmness level
- You’re shopping for an airbed on a tight budget
- You’re part of a couple and have similar but differing needs from a bed
- You enjoy a balanced feel with moderate conforming
Keep Shopping if…
- You prefer a bed with a soft or medium soft firmness level
- You require deep, high-performance pressure relief
- You sleep very warm
How Much Is the Sleep Number Classic Series Mattress?
The Sleep Number C2 has a low price-point that makes it one of the least expensive airbeds on the market. The slightly thicker C4, on the other hand, comes in at a significantly higher cost. Given that the average airbed is over $2,200, the Classic series is perfect for shoppers on a budget. The prices for the Classic Series tend to be more comparable to all-foam or hybrid beds.
Of course, this low price comes with a cost. Instead of being fully adjustable like the more expensive Sleep Number lines, the Classic series ranges more from medium to firm, depending on the model. Similarly, the less-pricey C2 has a simple remote, as opposed to the C4’s remote with a digital firmness reading. Keep in mind that delivery costs at least $199 for customers in all 50 states.
|Split California King||-||-||$3798|
|Split California King||-||-||$5398|
|Split California King||-||-||$6998|
How Does the Sleep Number Classic Series Feel?
Both the C2 and C4 models from the Classic series offer a balanced feel, with low to moderate cradling around the body and the feeling of sleeping both ‘on’ and ‘in’ the mattress. Gel-infused polyfoam provides a slightly more resilient feel than memory foam, and the fairly thin comfort layers in both models prevent sleepers from feeling like they’re sinking into the bed. However, they still provide adequate pressure relief for the majority of sleepers.
Although the C2 and C4 beds share many similarities, they do have their differences as well. The C4’s extra inch of polyfoam makes it softer than the C2, allowing it to range from medium to firm. The C2, on the other hand, ranges only from medium firm to firm. The C4 also has a plusher feel with slightly more contouring around the body, though both mattresses performed similarly in our pressure relief testing.
The dual air chamber support core provides firm yet subtle support in both models. While some of our C2 testers reported being able to feel the chambers slightly through the comfort layer, there were few reports of this with the C4.
What Is the Sleep Number Classic Series Made Of?
The Classic series pairs gel-infused polyfoam with an adjustable, dual air chamber support core to offer sleepers a personalized night’s sleep. As Sleep Number’s budget-minded 360 Smart Bed series, both Classic models are significantly less complex than their Performance and Innovation series. However, despite being thinner and built with fewer layers, the Classic series still features high-quality construction with premium materials.
In addition to the usual mattress construction layers, the Classic series also has integrated smart SleepIQ technology to track your sleep. Both models also have a remote for firmness adjustment at the touch of a button; this remote is a simple higher or lower toggle for the C2, while the C4 has a more complex remote with a digital reading of the current firmness level, or “sleep number.”
The C2 uses a rayon-polypropylene blend for its cover, while the C4 uses both polyester and polypropylene. In both cases, the cover is smooth, slightly stretchy, and resistant to sagging even at the lowest firmness setting.
The C2 and C4 models are primarily distinguished by their comfort layer. Both feature gel-infused polyfoam, but this layer is two inches in the C2 and three inches in the C4. This minor difference gives the two models different firmness ranges, as well as slightly different feels. Polyfoam offers a less ‘cradling’ feel than memory foam, and the gel infusion is thought to promote better airflow and temperature neutrality.
Although other construction details are also important, Sleep Number’s mattresses are set apart by their air chamber support cores. The Classic series features dual chambers, allowing users to set a different firmness level on each side of the bed. Discreet pumps release or take in air as needed to set the level, which can be done with the press of a button. Overall, airbeds like the Classic series provide very balanced support, though with minimal bounciness.
What Type of Sleeper Is the Sleep Number Classic Series Best for?
As adjustable airbeds, both the C2 and C4 offer sleepers a wider degree of suitability than many all-foam or pocketed coil options. However, their smaller range of adjustment compared to the fully adjustable beds in Sleep Number’s Performance and Innovation series does make them less suitable for some positions.
The C4 has a wider range of potential firmness levels, ranging from medium to firm. The C2, on the other hand, is limited to medium firm to firm. Furthermore, the two beds have slightly different pressure-relieving qualities, with the C4’s thicker polyfoam layer providing more comfort for positions that typically create pressure points.
Between them, both the C2 and C4 are capable of supporting the majority of sleepers, regardless of their preferred position. This is dependent on the firmness adjustment, as sleepers who have “found their sleep number” report a much better sleep than those still in the process of trying out different levels. Due to these factors, customers should expect a period of adjustment and testing when they first receive their C2 or C4 mattress.
The C4 is slightly more effective for side sleepers, as the thicker polyfoam cushions prominent areas at the shoulder and hip. However, both mattresses offer this category fairly good performance, with side sleepers appreciating both models regardless of how much they weigh.
Stomach sleepers require good support for both the hips and the upper body in order to prevent next-day stiffness or pain. While among the least suitable sleep positions for the Classic series, our stomach sleeping testers still reported that both the C2 and C4 offered enough support for a comfortable night’s sleep. All the same, stomach sleepers in search of enhanced support may want to consider Sleep Number’s Performance series.
Among our testers, back sleepers were some of the biggest fans of the Classic series. This was more dependent on choosing the right model than with some other positions, with back sleepers of different weights preferring either the C2 or C4.
How Does Body Weight Impact Performance?
Mattress suitability is always related to an individual’s sleep position preference, but weight almost always plays its own major role. Beds with adjustable firmness levels are more flexible in terms of who they’re suitable for, as firmness level is one reason for the importance of weight categories.
All the same, the Classic series has limited adjustability, meaning that the softer C4 is slightly more appealing to sleepers under 130 pounds than the C2. The opposite is also broadly true, with sleepers above 130 pounds tending to prefer the C2, though this was not true in every category. For example, side sleepers between 130 and 230 pounds reported that they enjoyed both the support of the C2 and the thicker comfort layer of the C4.
Many sleepers under 130 pounds prefer a softer-feeling mattress than either the C2 or C4. If this is true of your needs, you may prefer the fully adjustable Performance or Innovation airbed series from Sleep Number.
Is it Good for Couples?
Couples are likely to enjoy the Sleep Number Classic Series, but may have concerns about its performance in a few crucial areas.
One of the most critical factors when couples choose an airbed is ensuring each side can be adjusted individually. Since this adjustment is one of the best features of an airbed, it makes little sense to resign yourself to an imperfect compromise between your and your partner’s needs. With its dual air chamber design, the Classic series fits this requirement.
However, couples may be let down by the edge support, suitability for sex, and temperature neutrality of both the C2 and C4 models. Although almost always coming in with an average score that’s likely to please most customers, both models score lower in these categories than others. If you are looking for premium performance, you may want to choose one of Sleep Number’s other 360 Smart mattresses.
Sleep Number's Trial, Warranty, and Shipping Policies
Sleep Number mattresses, including the Classic series, can only be bought through Sleep Number’s official website, or at one of their branded showrooms across the USA.
Sleep Number ships their mattresses only within the contiguous U.S. states and Alaska. Their airbeds are shipped with their various parts packaged separately, making set-up more involved than mattresses that are simply rolled and compressed for shipment. However, since there is no air in the chambers until it is set up, this makes the entire shipment process far more manageable.
While some Sleep Number products are available by USPS, the Classic series is shipped only with Home Delivery. This service, which we detail in the section below, costs $199 for most customers and $249 in some remote areas.
- Additional Services
Smart airbed mattresses like the C2 and C4 tend to be more difficult to set up than standard mattresses. To help customers with this process, Sleep Number offers Home Delivery for $199, or $249 in remote regions. This is their only shipping option for the Classic Series, and the fee is non-refundable.
Sleep Number professionals will arrive with your mattress, set it up as you desire, and remove your old mattress for disposal or recycling.
- Sleep Trial
Sleep Number offers a 100-night trial for all of its mattresses, including both models in the Classic series.
The customer must wait out an initial 30-day break-in period, which the company requires in order for customers to become accustomed to their new bed and decide whether or not it works for them. After this period, customers who are not satisfied may exchange their mattress, or send in their mattress for a full refund.
Customers are responsible for the shipping costs of returning their mattress to Sleep Number.
All of the beds in Sleep Number’s 360 Smart collection come with a 25-year warranty which is prorated after 2 years. Beginning with year three, owners must pay a prorated charge of 20% of the mattress’s original price. This increases by 4% per year until the nineteenth year. Then, from years 20 through 25, owners are responsible for 96% of the original product price.
The warranty is non-transferable and does not cover ordinary wear and tear, tampering with the Firmness Control System, or physical damage that occurs after the mattress has been delivered.