Innerspring Mattresses (Traditional), Therapedic

Therapedic TheraLuxe HD Jackson Firm

Built for larger sleepers and those who need actual durability out of a mattress, the Therapedic TheraLuxe HD Jackson Firm features harder feel, complemented by ultra-dense 3 lb foam, 1,872 heavy-duty pocketed coils, and reinforced edge support to maintain its shape and feel for years. Backed by a 20-year warranty, this adjustable base-friendly mattress is designed to outlast and outperform standard beds..

TheraLuxe HD Sale Event!

Take $100 OFF All Twin
Take $150 OFF All Full
Take $200 OFF All Queen
Take $250 OFF All King
Sale Ends April 30th!

Comfort Level

Harder

Softer

Sizes Available

Mattress Only Price

Add TheraLuxe HD
Reinforced Wood Foundation

Twin

$1099

$169

Twin XL

$1149

$189

Full

$1399

$229

Queen

$1499

$249

King

$1799

$378

Cal-King

$1799

$378

Foundation = rigid, all-wood support base (often called a ‘box spring'

The HD Stands for HEAVY DUTY.

Therapedic TheraLuxe HD Jackson Firm

Overview / Description
The TheraLuxe HD Jackson Firm is our no-nonsense, heavy-duty option for sleepers who want a genuinely firm mattress that can handle heavy-duty, real-world use, night after night. It uses an ultra-durable pocketed coil core paired with thick, high-density foams on top, so you get a supportive, slightly contouring surface without the “sink” or sag you may have experienced in softer mattresses. At about 11″ tall with a tight-top design and Feran Ice® performance fabric, the Jackson stays flat, stable, and comfortably cool.

Best For

  • Back and stomach sleepers who prefer a firm, flatter surface.

  • Sleepers with larger or heavier builds who are tired of mattresses breaking down too quickly.

  • Anyone who wants a traditional, firm feel with better motion control and edge support than a basic innerspring.

Key Features

  • Heavy-duty TheraLuxe QLX® HD pocketed coil unit (17-gauge steel) for deep, stable support and long comfort life.

  • 3″ total of ultra-premium, high-density polyurethane foams (2.1 lb + 3.0 lb) above the coils for firm yet cushioned surface comfort.

  • TheraEdge™ extra-firm foam encasement to keep the edge from collapsing when you sit or sleep near the side.

  • Stretch-knit cover with Feran Ice® technology to help wick moisture and manage surface temperature.

  • 20-year, non-prorated warranty when built to TheraLuxe HD standards, with a stricter impression tolerance than typical mass-market beds (warranty terms may vary by ticket).

Construction & Specs

  • Comfort & Transition Layers

    • TheraSafe™ fiber/fire barrier.

    • 1″ Superior High-Density polyurethane foam (approx. 2.1 lb) quilted into the cover.

    • 2″ TheraFoam™ high-density polyurethane foam (approx. 3.0 lb) for firm contouring support.

    • Firm insulator pad over the coil unit.

  • Support System

    • TheraLuxe QLX® HD wrapped coil unit by Leggett & Platt (1872, 17gauge Quantum encased coils), designed as a heavy-duty, high-count pocketed spring system.

  • Edge Support & Base

    • 3″ of 50-lb Density compression TheraEdge™ foam encasement around the perimeter of the spring unit for edge-to-edge support,

    • 1.5″ extra heavy-duty base foam bonded to the encasement for added stability.

  • Cover & Cooling

    • Stretch-knit fabric

  • Mattress Height

    • Approx. 11.5″.

  • Available Sizes

    • Twin (38″x74″)
      Twin XL (38″x80″)
      Full (54″x74″)
      Queen (60″x80″)
      King (76″x80″)
      California King (72″x84″)

  • Adjustable Base Compatibility

    • Works with adjustable bases or a properly built heavy-duty foundation.

 

A Mattress Collection Built. To. Last.

Every day we listen to customers tell us the same story: appliances that fail after a few years, furniture that sags too soon, and mattresses that simply can’t keep up. A bed shouldn’t be one of the “disposable” items in your home. At Mattress Mart, we believe your mattress should be a durable investment in your sleep, not a short-term purchase you’re forced to replace before its time.

That’s why we proudly feature the TheraLuxe HD line by Therapedic—a collection built from the ground up for long-lasting support, exceptional durability, and real-world performance at an outstanding value. These mattresses use higher-density foams and a stronger, heavy-duty spring system than most beds on the market, so they hold their shape night after night, even for the largest sleepers and the most demanding households. They’re backed by one of the industry’s strongest warranty programs, reflecting the confidence Therapedic has in the materials and construction.

To complete the system, you can pair your TheraLuxe HD mattress with an adjustable base or with the Therability™ Heavy Duty wooden foundation, which features 20 cross-slats, 2×4 bracing, and a 105-lb build weight in queen for unmatched stability and support. This is a sleep setup designed not just to feel good in the showroom, but to stand up to years of everyday use.

If you’re tired of mattresses that break down long before you’re ready to replace them, it’s time to step up to something better. Come feel the TheraLuxe HD difference for yourself—we dare you to compare.

Not sure what makes this “HD”? See our Heavy-Duty Mattress Guide.

Additional Information

Mattress Mart

Mattresses to help you sleep well and live better.