Frontal view of the South Bay ActiveAlign 14-inch medium-soft hybrid mattress on a light grey bed frame in a modern bedroom setting

High-angle top view of the ActiveAlign Reactive Copper zoned mattress highlighting the ergonomic wavy pattern for recovery-driven sleep.

Isolated perspective studio shot of the 14-inch ActiveAlign medium-soft hybrid mattress featuring copper-gel memory foam and pocketed coils.

Minimalist side view of the South Bay 14-inch thick hybrid mattress highlighting its deep navy textured border and supportive height.

Cooling technology infographic for the ActiveAlign mattress detailing the copper-gel infusion, pocketed coils, and woven cool-to-the-touch cover.

Pocketed coils infographic for the South Bay hybrid mattress explaining individual support, motion isolation, and enhanced airflow for undisturbed sleep.

4 Zones of Comfort diagram for the ActiveAlign Reactive Copper mattress showing targeted spinal alignment and pressure relief for hips and shoulders.

Firmness scale for the ActiveAlign 14-inch hybrid mattress indicating a medium-plush comfort level suitable for all sleepers.

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

Silhouette demonstrating the flexibility of the South Bay 14-inch hybrid mattress on a motorized adjustable power bed base.
Image 14: Technical Layer Diagram

Technical layer diagram of the ActiveAlign 14-inch hybrid mattress featuring zoned recovery support, copper-gel cooling, and enhanced edge stability.

ActiveAlign Reactive Copper Zoned Patented Edge Support - Foam Encased Medium-Soft 14 inch Hybrid Mattress By South Bay

Plush Medium Firm Pillow top Memory foam Hybrid

ActiveAlign Reactive Copper Zoned Patented Edge Support - Foam Encased Medium-Soft 14 inch Hybrid Mattress By South Bay

$795.00

$999.00

Save $204.00

Brand:

SOUTH BAY

i Size Guide

$795.00

Only 12 left in stock

Free USA Wide Delivery

10 Year Warranty

Advanced Technology

The ActiveAlign Reactive Copper 14 Inch Hybrid Mattress brings together plush, conforming comfort and zoned pocketed coil support in a luxurious 14-inch foam-encased build. Cloudy Mattress is the authorized South Bay retailer for this product, so every purchase comes with trusted sourcing and the full manufacturer warranty.

The feel sits on the medium-soft side of the comfort scale, delivering plush cradling that side and back sleepers often seek. Because of this cushioned response, it ranks among the medium soft hybrid mattress for side sleepers options for pressure relief at hips and shoulders.

Inside, multiple engineered components work together, beginning with antimicrobial copper-infused foam that delivers cooling and recovery benefits at the surface. This medium soft copper hybrid mattress uses copper's natural heat conductivity to draw warmth away from the body for a temperature-neutral sleep surface.

Furthermore, the copper layer creates an antimicrobial environment that helps resist odors and microbes for fresher rest night after night. A defining feature is the zoned pressure relief system, with targeted transition foam that adapts to the lumbar and hip regions for healthy spinal alignment.

This design delivers joint pressure relief and recovery that suits athletes, fitness enthusiasts, and anyone with muscle tension at the end of the day. Beneath the foam layers, individually wrapped pocketed coils form the supportive core, delivering responsive lift with superior motion isolation for couples.

The hybrid mattress architecture blends the contouring comfort of memory foam with the gentle bounce, breathability, and motion control of an innerspring system. A patented edge support system with high-density foam encasement reinforces the perimeter, adding roughly 20% more usable sleeping space and stability.

At a full 14-inch profile luxury height, this 14 inch luxury hybrid mattress is fully adjustable-base compatible and delivers a luxury hotel sleep experience at home. Additionally, it arrives compressed and rolled for convenient delivery, and is backed by a 10-year manufacturer warranty.

Plush Cloud-Like Comfort

A medium-soft top layered with plush adaptive comfort layers cradles hips and shoulders for cushioned pressure relief.

Copper Recovery Technology

Antimicrobial copper-infused foam delivers heat-conductive cooling technology and natural antimicrobial protection for recovery-focused sleep.

Zoned Targeted Support

The zoned pressure relief system adapts to the lumbar and hip regions, supporting joint pressure relief and recovery through the night.

Pocketed Coil Hybrid Core

Individually wrapped pocketed coils deliver responsive support with superior motion isolation for couples, ideal for sharing the bed.

Foam-Encased Edge Support

High-density foam encasement reinforces the perimeter, adding roughly 20% more usable sleeping space and a steadier sitting edge.

Adjustable Base Ready

Fully adjustable-base compatible, the 14-inch profile pairs seamlessly with modern foundations for personalized comfort positioning.

Certified Clean Foams

All foams are CertiPUR-US certified, made without formaldehyde, phthalates, heavy metals, or ozone depleters.

Key Mattress Benefits

6 Layers
Of Cooling
Comfort

This top layer is the antimicrobial copper-infused foam that delivers a plush, cradling feel at the sleep surface. The copper helps conduct heat away from the body and provides natural antimicrobial properties for a fresher rest.

This middle section is the zoned pressure relief system that delivers different conformity levels across the body. Targeted support at the lumbar and hip regions promotes spinal alignment, while softer cushioning at the shoulders cradles side sleepers.

A reinforced high-density foam encasement wraps the perimeter of the coil unit. This system expands the usable sleeping area by roughly 20%, adds a stable sitting edge, and helps extend the mattress's overall lifespan.

This core layer is built from individually wrapped pocketed coils that deliver responsive support and gentle bounce. Furthermore, the pocketed design significantly reduces motion transfer between partners while promoting airflow through the core.

This bottom layer reinforces the structural integrity of the mattress and anchors the entire build. It supports long-term durability and helps maintain consistent shape and performance over time.

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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Foam encasement at 14 inches - edge support is extraordinary

14-inch hybrid mattresses usually have soft edges because there's more material to compress. The foam encasement on the ActiveAlign surrounds the coil system completely so the edges are as firm as the center. I sleep right at the perimeter and the support is identical to the middle of the mattress. South Bay solved the deep mattress edge problem that other manufacturers accept.

Copper cooling at 14 inches with hybrid coils - triple thermal benefit

Copper cooling from the infused foam. Hybrid coil airflow from below. 14 inches of material depth that distributes body heat more broadly. Three separate thermal mechanisms working together. I track sleep temperature and the ActiveAlign 14 inch Hybrid is the coolest mattress I've measured at any medium-soft feel. Hot sleepers who need a softer surface - this is the solution.

Medium-soft reads soft to me

The ActiveAlign 14 inch Hybrid is superbly constructed - every feature performs as described. My personal note is the medium-soft feel reads closer to soft than medium-soft to me. Coming from a medium mattress I found it softer than I expected. Dedicated soft sleepers and side sleepers who need pressure relief will find it ideal. People on the firmer side of medium-soft should calibrate accordingly.

Zoned foam at 14 inches - the depth makes the zones more effective

At 10 inches zoned foam has limited depth in each zone. At 14 inches each zone has proper material depth to deliver its intended support level. The firmer hip zone is genuinely firmer and the softer shoulder zone is genuinely softer. The 14-inch profile gives the zoning concept the room it needs to perform correctly.

14 inches of zoned hybrid - the most complete mattress I've owned

Every feature on the ActiveAlign 14 inch Hybrid is purposeful. Copper cooling for temperature. Zoned foam for body-specific support. Reactive foam for immediate response. Foam encasement for edge integrity. Hybrid coils for airflow and responsiveness. 14 inches for full layer depth. Medium-soft for side sleeping comfort. Nothing is redundant and everything works. The most thoughtfully engineered mattress I've found.

HAVE QUESTIONS?

WE'VE GOT ANSWERS

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

Yes, this 14-inch hybrid is well-suited for side sleepers. The medium-soft copper-infused foam top cradles the shoulders and hips where side sleepers need the most cushioning, while the pocketed coil core delivers the underlying support needed to keep the spine in healthy alignment.

Copper offers two primary verified benefits in a mattress. First, it has natural antimicrobial properties that help resist odors and microbes for a fresher sleep surface. Second, copper is heat-conductive, so it helps draw warmth away from the body, supporting cooler surface temperatures and a more breathable sleep experience.

Zoned support refers to a design where different sections of the mattress provide varied levels of firmness or contouring to match the body's natural pressure points. In the ActiveAlign 14-inch hybrid, the transition foam offers targeted support at the lumbar and hip regions while remaining softer at the shoulders.

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 metal foundation as an add-on at checkout.

Yes, all foam layers in this mattress are CertiPUR-US certified. They are made without formaldehyde, phthalates, ozone depleters, heavy metals, PBDEs, or listed Tris flame retardants, and they meet low-VOC standards for healthier indoor air quality.

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