Sleep Number Classic Series Mattress Review

Motion isolation is a measure of how well a mattress absorbs vibrations and prevents them from transferring across the surface of the bed. The better motion isolation a mattress has, the less movement you’ll feel when your partner gets in and out of bed or changes sleep positions during the night.

The Sleep Number Classic Series minimizes motion transfer. The airbed design of the c2 and c4 gives these beds a slight bounce, but the polyfoam comfort layers limit the spread of vibrations. However, an airbed model with a thicker comfort system may perform better in this category.

The airbeds in the Sleep Number Classic Series provide moderate pressure relief. This metric measures the degree to which a mattress contours to the shape of your body and redistributes its weight. Sleepers may have different pressure relief preferences depending on their body weight and sleep position.

Most of the pressure relief from the Classic Series models comes from their polyfoam comfort layers. The adjustable firmness also means that sleepers with different pressure relief needs can transform the surface as needed.

However, the Sleep Number Classic Series may not be ideal for sleepers who enjoy the deep contouring and additional pressure relief of a thicker comfort system.

The Sleep Number Classic Series maintains a fairly neutral temperature during the night. The polyfoam comfort system is thick enough to provide moderate contouring without hugging so closely as to trap excessive heat. Additionally, a gel infusion in the polyfoam is designed to help the surface stay cooler by transferring heat away from the sleeper. This temperature control is on par with many airbeds and should satisfy most sleepers.

3/5 (c2)
2/5 (c4)

Edge support refers to how well the sides of a mattress support the weight of your body, which affects the amount of usable sleep space and the ease of getting into and out of bed.

The Sleep Number Classic Series models provide support along their perimeters. Hybrid and innerspring models frequently offer sturdier support, but the c2 and c4 have stronger edges than many all-foam and memory foam mattress models.

The c2 offers superior edge support to the c4 due to its slightly thinner polyfoam comfort system. Additionally, the firmer settings of the c2 and the c4 provide more support along the perimeter by limiting sinkage

Sleepers should find it fairly easy to move around on both the c2 and the c4, especially when using the firmer settings. Their polyfoam comfort layers relieve pressure and reduce motion transfer while responding quickly to changes in pressure so that sleepers are unlikely to feel trapped in the bed. This should make it easier to change positions as needed.

The dual-chamber design of the Sleep Number Classic series models is well-suited for customizing comfort for couples. However, this feature essentially splits the bed’s support core into two sections, creating a slight depression in the middle of the mattress that may not be ideal for sex. However, the firmer settings should allow couples to move on the bed relatively easily, which may facilitate amorous activity.

Off-gassing refers to the release of volatile organic compounds (VOCs) after unboxing your new mattress. VOCs are a byproduct of manufacturing. Although they aren’t generally considered harmful, they can give off a noticeable smell.

Synthetic materials, such as polyfoam and memory foam, tend to produce more odors than other mattress materials. Beds that have been compressed and boxed for shipping immediately after production are also more likely to emit an odor since they haven’t had time to air out.

Because of their air chamber cores, the models in the Sleep Number Classic Series are not prone to off-gassing.

That said, the c2 and the c4 contain polyfoam comfort layers, so you may notice a slight smell at first. However, any odor should be minor and short-lived, especially when compared to a foam-based mattress.