If you’re shopping for a new bed, you’ve probably asked, what are Sleep Number mattresses made of? It’s a smart question, because the materials inside determine how it feels, supports, and lasts. Unlike traditional one-piece mattresses, they are a unique combination of adjustable air technology and specialized comfort layers. This guide will break down every component so you know exactly what you’re investing in.
What Are Sleep Number Mattresses
At their core, Sleep Number beds are adjustable air mattresses. But calling them just an “air mattress” doesn’t do them justice. They are sophisticated sleep systems with dual air chambers, allowing each side of the bed to be customized to a specific firmness, or “Sleep Number.” Surrounding these air chambers are layers of foam and fabric designed for comfort and support, all contained within a durable mattress cover.
The Core Technology: DualAir™ Adjustable Chambers
The heart of every Sleep Number mattress is its air chamber system. Here’s how it works:
- Dual Chambers: Most models have two separate air chambers (one for each sleeper) encased in a foam border. This lets you and your partner choose your ideal firmness independently.
- Air Technology: The chambers are made from a durable, flexible material—often a urethane-coated fabric—that’s designed to hold air consistently without stretching or sagging over time.
- The Pump: A quiet, integrated pump adds or releases air from the chambers based on your selected Sleep Number setting (usually a scale from 5 to 100).
Comfort Foam Layers
On top of the air chambers, you’ll find various foam layers. The type and amount differ by model (like the Classic, Performance, and Innovation series).
- Support Foam: This is a firmer foam that sits directly above the air chamber, providing a stable base and preventing you from feeling the chamber itself.
- Comfort Foam: This is the layer you actually feel. Sleep Number uses several proprietary foams:
- Gel Memory Foam: Used in many models, it offers contouring pressure relief with a cooler feel than traditional memory foam.
- PlushFit™ Foam: A polyurethane foam designed to be responsive and breathable, providing a softer, more “on-top” of the bed feeling.
- AirFit™ Foam: This is an open-cell foam that aims to increase airflow for better temperature regulation.
The Mattress Cover: Integrated or Removable?
The cover is a critical part of the sleep surface. Higher-end Sleep Number beds feature integrated covers with built-in technology.
- Cooling Covers: Many models use covers with phase-change material or moisture-wicking fabrics to help dissipate heat.
- Stretch Fabric: Covers are typically made from a polyester blend with stretch to allow the air chamber to move and adjust without restriction.
- Removable Top Layer: On some models, the top comfort layer is a removable pad that can be spot-cleaned. The main cover is not usually fully removable for washing.
Edge Support & Base Foam
To prevent that “rolling off” feeling, Sleep Number mattresses have reinforced edges.
- A high-density foam border surrounds the air chambers, providing a stable edge for sitting and sleeping near the side.
- The very bottom of the mattress consists of a base foam layer that protects the air chambers and gives the bed its overall shape and structure.
Differences Between Model Series
Not all Sleep Number beds are made the same. The materials get more advanced as you move up the product lines.
Classic Series
The most basic line. It has simpler foam comfort layers, often just a single layer of PlushFit foam. The cover is more basic, with less emphasis on active cooling. It’s a good entry-point to the adjustable feel.
Performance Series
The mid-tier option. This is where you’ll typically find gel memory foam layers introduced for better pressure relief. The covers often include cooling technology, and the edge support is more robust. The air chambers may also have enhanced durability features.
Innovation Series (Smart Beds)
The top-of-the-line models. These feature the most advanced materials, like multiple layers of different foams for targeted zoning. Their covers are often the most advanced, with temperature-balancing fabrics. They also include the SleepIQ® technology sensor pad that tracks sleep metrics, which sits between the comfort layer and the air chamber.
Special Features & Add-Ons
Sleep Number also offers modular additions that change what your bed is made of and how it functions.
- FlexFit™ Adjustable Bases: While not part of the mattress itself, these bases can elevate your head and feet, integrating with the bed for zero-gravity positions.
- Temperature Balancing Layer: An optional layer called the “Climate360” system (a separate purchase) actively heats or cools each side of the bed through a water-based system.
Durability & Lifespan of Materials
Understanding the materials helps estimate how long the bed will last. The air chambers are designed for long-term use, but they are mechanical components.
- The pump and hoses are the most likely parts to need service over a 8-10 year period.
- The foam layers, especially in higher-end models, use higher-density foams that resist sagging better than cheaper poly foam.
- The cover’s durability depends on care; using a mattress protector is highly recommended to prevent stains and wear.
Caring for Your Sleep Number Mattress
To make the materials last, proper care is essential. Follow these steps:
- Always use the recommended mattress protector. It safeguards the cover and comfort layers from spills and sweat.
- Rotate the mattress head-to-foot every 6 months. Since there are no innersprings, you don’t need to flip it.
- Clean spills immediately with a mild detergent and damp cloth. Avoid soaking the mattress.
- Keep the air chambers and pump area free from obstructions. Don’t store items under the bed that could block vents or pinch hoses.
Pros and Cons Based on Materials
The choice of materials leads to specific advantages and drawbacks.
Pros:
- Customizable Firmness: The adjustable air is the biggest benefit, perfect for couples or people whose firmness needs change.
- Good Motion Isolation: The air chambers and foam layers absorb movement well, so you’re less likely to be disturbed by a partner.
- Cooler Than All-Foam: The air space inside and use of breathable foams generally sleeps cooler than a solid memory foam mattress.
Cons:
- Potential for Repairs: The pump, hoses, and air chambers can leak or fail, requiring customer service.
- Less “Cushiony” Feel: Some people find the feel of an air chamber with foam on top less plush or conforming than a thick, all-foam or hybrid mattress.
- Edge Support: While improved, the edge support from foam borders may not be as strong as that from a coil system.
How to Choose the Right Model for You
Your choice should depend on which materials matter most to you. Consider this simple guide:
- For Budget-Conscious Shoppers: Look at the Classic series. You get the adjustable firmness without the premium foam or cooling covers.
- For Hot Sleepers: Prioritize the Performance or Innovation series with their gel memory foam and advanced cooling covers.
- For Tech Enthusiasts & Data Lovers: The Innovation series with SleepIQ technology is built for you, offering insights into your sleep patterns.
- For Those Needing Pressure Relief: Choose a model with gel memory foam or multiple comfort layers, typically found in the higher series.
Comparing to Other Mattress Types
It helps to see how Sleep Number materials stack up against other common types.
- vs. Innerspring: Sleep Number uses air and foam instead of steel coils. It offers better customization and motion isolation but a different, less bouncy feel.
- vs. Memory Foam: Sleep Number beds often include memory foam, but the adjustable air core provides a different support structure. They tend to sleep cooler than all-foam beds but may not contour as deeply.
- vs. Latex: Natural latex is more responsive and durable than the polyurethane foams commonly used in Sleep Number comfort layers. However, latex doesn’t offer adjustable firmness.
Final Thoughts on Construction
So, what are Sleep Number mattresses made of? They are a hybrid system: part adjustable air support, part specialized comfort foam, and part smart fabric technology. The genius is in the combination, allowing for a level of personalization that static mattresses can’t match. When you understand the materials—from the dual air chambers to the specific foam layers—you can make a confident choice that aligns with your sleep needs and preferences. Remember to try different models in store if possible, focusing on how the materials feel at your chosen Sleep Number setting.
FAQ Section
Are Sleep Number mattresses just air?
Not exactly. While adjustable air chambers are the core support system, they are combined with multiple layers of foam for comfort and a fabric cover. So it’s an integrated system, not just an air mattress.
What is inside a Sleep Number bed that makes it adjustable?
The key components are the DualAir air chambers, a quiet pump, and a hose system. You use a remote or smartphone app to tell the pump to add or release air from your side’s chamber, changing the firmness.
Do Sleep Number beds have coils or springs?
No, traditional innerspring coils are not used in Sleep Number mattresses. Support comes from the adjustable air chambers, stabilized by a surrounding foam border.
What kind of foam is in a Sleep Number mattress?
They use several types, including polyurethane PlushFit foam, gel-infused memory foam, and open-cell AirFit foam. The exact types and thickness vary by the model series you choose.
Can you feel the air chamber in a Sleep Number bed?
You should not feel the air chamber directly. A layer of support foam is placed above it to create a buffer. If you can feel it, it might mean your Sleep Number setting is too low, causing you to bottom out.
How long do the materials in a Sleep Number mattress typically last?
Many users report the bed lasting 8-10 years or more. The mechanical parts (pump, hoses) are most likely to need service before the foam or air chambers themselves wear out, assuming proper care.