Frontal view of the South Bay Active Align 10-inch medium-firm mattress featuring a blue wavy patterned cover on a contemporary upholstered bed frame.

Mattress firmness scale for the Active Align Reactive Copper mattress indicating a medium-firm comfort level suitable for side, stomach, and back sleepers.

South Bay mattress quality certifications highlighting a 10-year limited warranty, CertiPUR-US certified foam, and an "Assembled in USA" guarantee.

Cooling features infographic for Active Align mattress detailing the copper-gel infusion, Air Grid design, and cool-to-the-touch cover for temperature regulation.

Close-up technical graphic of the Air Grid base layer showing articulated cuts that provide maximum airflow and flexibility for adjustable bases.

Three-quarter perspective of the Active Align 10-inch copper zoned foam mattress in a modern bedroom setting with wood-paneled walls.

High-angle studio product shot of the Active Align mattress by South Bay, showcasing the distinctive blue patterned cooling cover.

Isolated frontal studio view of the 10-inch Active Align medium-firm mattress against a clean white background.

Easy 3-step setup guide for South Bay mattresses: unbox, unroll, and sleep, showing the convenient bed-in-a-box delivery system.

Graphic illustrating the flexibility of the Active Align mattress, showing full compatibility with motorized adjustable power bed bases.

Technical cross-section diagram of the Active Align mattress construction featuring recovery-driven copper cooling and a breathable Air Grid foundation.

Active Align Reactive Copper Zoned Foam - Patented Edge Support Medium Firm 10 inch Mattress By South Bay

Plush Medium Firm Pillow top Memory foam Hybrid

Active Align Reactive Copper Zoned Foam - Patented Edge Support Medium Firm 10 inch Mattress By South Bay

$588.00

$799.00

Save $211.00

Brand:

SOUTH BAY

i Size Guide

$588.00

Only 12 left in stock

Free USA Wide Delivery

10 Year Warranty

Advanced Technology

The South Bay Active Align Reactive Copper Mattress is engineered specifically for active sleepers who need recovery-focused rest in a balanced medium-firm 10-inch profile.

Cloudy Mattress is the authorized South Bay retailer for this product, so every purchase comes with trusted sourcing and the full manufacturer's warranty.

The feel sits firmly on the medium-firm side of the comfort scale, making it well-suited for back, stomach, and side sleepers alike. Because of this responsive support, it stands out as one of the best copper mattresses for back pain options for athletes and active individuals.

Inside, five engineered foam layers work together, beginning with copper-infused memory foam that delivers cooling and antimicrobial benefits at the sleep surface. This copper-infused memory foam mattress uses copper's natural conductivity to draw heat away from the body, creating a 10-inch medium-firm cooling mattress experience.

Furthermore, the fresh sleep environment is supported by copper's natural antimicrobial properties, helping resist odors and microbes through the night. A 2-inch reactive foam technology layer beneath delivers latex-like bounce-back support that adapts to your body without the deep sink-in feel of traditional memory foam.

This design encourages targeted spinal alignment and supports muscle recovery, ideal for fitness enthusiasts and combination sleepers. A M-Guard edge support system reinforces the perimeter, adding roughly 20% more usable sleeping space and a steadier feel along the sides of the bed.

Beneath the comfort layers, a 2-inch Support Foam plus a 5-inch Air Grid base form the high-density foam core with airflow channels for breathability and adjustable-base flexibility. Together, this zoned support mattress, queen size and other variants are designed to deliver restorative sleep support and pressure point relief night after night.

At 10 inches and fully adjustable-base compatible, this medium firm 10-inch mattress pairs seamlessly with any modern foundation. The mattress arrives via Mattress-in-a-box delivery, compressed and rolled for convenient setup, and is backed by a 10-year manufacturer's warranty.

Copper Recovery Technology

The copper-infused memory foam top layer combines cooling with natural antimicrobial protection for a recovery-focused sleep surface.

Reactive Bounce-Back Support

A 2-inch reactive foam technology layer delivers latex-like responsiveness with minimal sink-in for active sleepers.

Targeted Pressure Relief

Layered comfort and support foams provide zoned pressure relief and pressure point relief across shoulders, hips, and lower back.

Patented Edge Support

The M-Guard edge support system reinforces the perimeter and adds roughly 20% more usable sleeping surface.

Breathable Air Grid Base

A 5-inch Air Grid base with articulated cuts promotes airflow and adjustable-base flexibility for a cooler, more responsive sleep system.

Spinal Alignment Support

The combined reactive and support foams deliver targeted spinal alignment that helps active bodies recover overnight.

Certified Clean Foams

Built with CertiPUR-US certified foam and non-toxic sleep materials, made without formaldehyde, phthalates, heavy metals, or ozone depleters.

Key Mattress Benefits

6 Layers
Of Cooling
Comfort

This top layer is the copper-infused memory foam that delivers cooling and antimicrobial benefits at the sleep surface. The copper helps draw heat away from the body and naturally resists microbes for a fresher rest.

This second layer uses reactive foam technology to deliver a latex-like bounce-back feel. As a result, sleepers benefit from responsive support that adapts to movement without the deep sink-in of traditional memory foam.

A reinforced perimeter is built into the mattress to extend the usable sleeping area by roughly 20%. This system also provides a stable sitting edge when getting in and out of bed.

This middle layer adds reinforcement and structural support beneath the reactive comfort layers. It helps deliver a consistent feel across the entire mattress while transitioning into the base.

This bottom layer forms the high-density foam core of the mattress with articulated cuts that promote airflow through the base. Furthermore, the grid construction adds flexibility, making the mattress an excellent match for adjustable bases.

The exterior cover unzips for easy laundering and helps reduce allergens with regular washing. Its breathable design complements the copper-infused cooling system at the surface of the mattress.

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Zoned foam is the feature that changed everything

Most mattresses treat every part of your body the same. The Active Align's zoned construction gives firmer support under the hips and waist and softer contouring under the shoulders. For side sleeping this is exactly right - my hip doesn't sink too far and my shoulder gets the give it needs. Three weeks in and the shoulder and hip pain I woke up with every day is gone.

Active align - the name describes what it does

I was skeptical that a mattress name could be literal. The zoned foam actively aligns my spine in a way a uniform-feel mattress never has. The firmer hip zone prevents sag and the softer shoulder zone prevents compression. The result is a genuinely aligned spine throughout the night. My chiropractor measured improved cervical and lumbar positioning at my last appointment.

Zoned support best for side sleepers - back sleepers take note

The Active Align's zoned construction is genuinely impressive and clearly designed with side sleeping in mind. As primarily a back sleeper I find the shoulder zone slightly too soft for my back sleeping position - my shoulders sink a touch more than I'd prefer. The mattress is excellent and back sleepers will still find it comfortable - just know the design prioritizes side sleeping alignment.

Reactive foam makes the zoning work better

Zoned foam with slow memory foam response would be awkward when changing positions - you'd feel the zone transition. Reactive foam adapts quickly so the zone changes are seamless. I move through positions during the night and each zone responds immediately. The combination of zoning and reactive foam is what makes the Active Align feel intelligently designed.

Copper antimicrobial benefit confirmed at 4 months

Four months in and the mattress smells completely fresh. The copper infusion is maintaining mattress hygiene between washes in a way standard foam never did. I've owned this mattress half as long as my previous one and it already smells newer. Copper's antimicrobial properties are real and they compound in value over the life of the mattress.

HAVE QUESTIONS?

WE'VE GOT ANSWERS

Designed for deep comfort and better rest, so you wake up refreshed and ready for the day

The Active Align is designed with reactive foam and a layered support system that promotes targeted spinal alignment. Many sleepers find this combination helpful for general comfort and back support, especially active individuals recovering from physical activity. However, anyone with chronic or diagnosed back conditions should consult a medical professional before making a purchase decision.

Yes, copper is a naturally heat-conductive metal, so infusing it into the top memory foam layer helps draw warmth away from the body. This conductive effect supports cooler surface temperatures and a more breathable sleep experience, especially valuable for hot sleepers.

Zoned foam support refers to a mattress design where different layers or sections are engineered to provide varied levels of firmness and contouring across the body. In the Active Align, the combination of copper memory foam, reactive foam, support foam, and Air Grid base works together to deliver pressure relief at the shoulders and hips while maintaining firmer support beneath the core and lower back.

The patented edge support system reinforces the perimeter of the mattress with denser foam framing. This expands the usable sleeping surface by roughly 20%, provides a steadier sitting edge when getting in and out of bed, and helps extend the mattress's overall longevity by reducing edge wear.

A box spring is not required. The mattress can be placed on a continuously solid surface, an adjustable base, or slats spaced no more than two inches apart. Cloudy Mattress also offers an optional box spring with a metal foundation as an add-on at checkout.

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