Firm Sealy® Springwall Mattresses
Sealy mattresses are engineered for dependable, body-aligning support — many featuring Posturepedic Technology that reinforces the centre third where you need it most. Compare every option below by feel, size, and price.
Springwall builds innerspring mattresses around heat-tempered drawn spring steel, with polyurethane foam comfort layers and matching foundations framed in spruce, pine and fir with steel wire. Comfort choices run from extra firm to plush, which makes the decision a question of fit rather than quality. Back sleepers generally do best on medium to firm, stomach sleepers want the firm end, and a softer surface gives the shoulder and hip room to settle for side sleepers. A firm innerspring on a sound foundation remains the straightforward answer for anyone who wants a supportive, traditional feel rather than the slow sink of an all-foam bed.
How to Choose a Springwall Mattress
Springwall is an innerspring maker, so start with what the spring actually does. Heat-tempered drawn spring steel is wire drawn to a consistent diameter and then heat-treated, which sets its temper: the property that substantially reduces the height a coil loses after being compressed thousands of times. It reduces that loss rather than eliminating it, and temper is not usually what gives way first. On most beds the comfort layers soften before the springs weaken. Above the springs sit polyurethane foam comfort layers, and how thick and how firm those layers are is what turns one spring unit into an extra firm bed or a plush one.
Choose firmness by how you sleep, not by how the bed feels in the first thirty seconds. Back sleepers generally want medium to firm, because the pelvis has to stay near the surface for the lower back to hold its natural curve without being flattened. Stomach sleepers want the firm end, and extra firm belongs there and to heavier bodies. Side sleepers generally want medium or plush, because the shoulder and hip need to sink for the spine to stay level. Weight moves everything about a notch. The foundation matters as much as the mattress: a spruce, pine and fir frame with steel wire, or a metal and wood build, spreads load evenly and keeps the spring unit flat.
Heat-Tempered Steel Springs
Drawn steel wire is heat-treated so each coil loses far less height under repeated compression. Temper governs how long the spring unit holds up, though the comfort layers above it usually soften first.
Extra Firm Through Plush
The same spring unit under different comfort layers produces very different feels, so choose by sleeping position and body weight rather than by the name on the label.
SPF and Steel Wire Foundations
Spruce, pine and fir framing with steel wire, or a metal and wood build, gives the mattress a flat, load-spreading base. A foundation that has lost its flatness passes the dip straight into a new mattress.
Traditional Innerspring Feel
An innerspring pushes back rather than hugging, so moving and getting up is easier and air travels through the spring layer. See more innerspring mattresses.
Frequently Asked Questions About Springwall Mattresses
What is a heat-tempered drawn spring steel innerspring?
Which Springwall firmness is right for me?
Do I need a new box spring with a new mattress?
Is an innerspring mattress better than foam?
Are firm mattresses better for your back?
How long does an innerspring mattress last, and how do I care for it?
Choosing a Springwall Firmness?
Our non-commissioned sleep experts can match spring feel and comfort layer to your sleeping position and weight, and tell you whether your foundation is still doing its job.
Upgrade your sleep at National Mattress
Discover a mattress that transforms your sleep into a truly rejuvenating experience. We offer a wide variety of options to suit every sleep style and preference, ensuring a better night's sleep.
Why Choose Us?
- Variety: From plush to firm, we have options for every body type and sleep style.
- Quality: Trusted brands and top-notch materials for long-lasting comfort.
- Sleep Trials & Warranties: Enjoy peace of mind with flexible trials and warranties.
- Expert Advice: Get personalized recommendations from our sleep specialists.
Mattress Selection Includes
- Memory Foam: Contours to your body for personalized comfort and pressure relief.
- Hybrid: Combines responsive springs with foam for balanced support and comfort.
- Innerspring: Provides firm support, bounce, and cooling airflow.
- Latex: Hypoallergenic, eco-friendly, and exceptionally comfortable.
- Adjustable Beds: Customize your sleep position for optimal comfort.
