Front view of the South Bay Sofinity Hybrid Plus 14-inch medium-soft mattress on a modern upholstered bed frame in a designer bedroom.

Top-down view of the Sofinity Hybrid Plus mattress surface highlighting the luxurious tufted quilting and wave-patterned cooling cover.

Detailed close-up of the Sofinity Hybrid Plus mattress corner showing the high-quality stitching, durable side panels, and signature navy blue piping.

Isolated perspective studio shot of the South Bay Sofinity Hybrid Plus 14-inch mattress featuring a breathable white top and dark charcoal borders.

Minimalist frontal studio view of the 14-inch thick Sofinity Hybrid Plus medium-soft mattress against a clean white background.

Lifestyle image of a woman sleeping on the Sofinity Hybrid Plus mattress with a firmness scale indicating a medium-plush comfort level.

Technical infographic for Sofinity Foam showcasing 2x air permeability and open-celled structure for maximum breathability and cooler sleep.

Cooling features infographic for South Bay mattresses highlighting 4x cooling with Sofinity foam, copper-gel, and breathable pocketed coils.

Diagram of individually wrapped steel pocketed coils for enhanced motion isolation, precise support, and increased airflow in the hybrid mattress.

Exploded technical diagram of the Sofinity Hybrid Plus construction layers featuring Sofinity foam, dual-layer cooling comfort, and hybrid support.

Patented Edge to Edge support technology infographic showing a family sleeping on a mattress with a 20% larger usable sleeping surface.

Sofinity Hybrid Plus, Sofinity Foam, Patented Edge Support Medium-Soft 14 inch Mattress By South Bay

Plush Medium Firm Pillow top Memory foam Hybrid

Sofinity Hybrid Plus, Sofinity Foam, Patented Edge Support Medium-Soft 14 inch Mattress By South Bay

$888.00

$1,399.00

Save $511.00

Brand:

SOUTH BAY

i Size Guide

$888.00

Only 12 left in stock

Free USA Wide Delivery

10 Year Warranty

Advanced Technology

The Sofinity Hybrid Plus Mattress brings together cloud-like medium-soft comfort and responsive pocketed coil support in a luxurious 14-inch hybrid build. 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 on the medium-soft side of the comfort scale, delivering the plush cradling that side and back sleepers often seek. Because of this cushioned response, it ranks among the best 14-inch mattresses for side sleepers, offering options for pressure relief at the hips and shoulders.

Inside, multiple engineered layers work together, beginning with Sofinity Foam at the surface that delivers ergonomic contouring with roughly twice the airflow of traditional foam. This 14-inch plush hybrid mattress uses proprietary Sofinity Foam to create a breathable, temperature-regulated sleep environment from the very top of the mattress. Furthermore, the lightweight, open-cell structure conforms effortlessly to the body, supporting targeted spinal alignment while remaining naturally cooler than dense memory foam.

This combination creates the softest hybrid mattress for the hip pain experience that many side sleepers and combination sleepers seek. The mattress also features individually wrapped pocketed coils that deliver responsive lift with reduced motion transfer for couples sharing the bed.

A M-Guard patented support system reinforces the perimeter, adding roughly 20% more usable edge-to-edge sleeping surface and a steadier sitting edge. Beneath the coil core, high-density reactive Sofinity foam anchors the build with the best high-profile hybrid mattress stability and longevity.

At a full 14-inch profile, this medium soft pocketed coil mattress is fully adjustable base compatible and pairs seamlessly with modern foundations. Together, these layers deliver a cloud-like luxury comfort and deep restorative luxury sleep that combines plush contouring with responsive coil support. Additionally, it arrives via mattress-in-a-box shipping, compressed and rolled for convenient delivery, and is backed by a 10-year manufacturer's warranty.

Cloud-Like Plush Comfort

Sofinity Foam, paired with cushioning gel memory foam, delivers cloud-like luxury comfort ideal for side and back sleepers.

Sofinity Foam Technology

Proprietary Sofinity Foam delivers ergonomic body contouring with roughly twice the airflow of traditional foam for a cooler, more breathable sleep.

Pocketed Coil Hybrid Support

Individually wrapped pocketed coils deliver responsive support with reduced motion transfer for couples sharing the bed.

Patented Edge Support

The M-Guard patented support system reinforces the perimeter, delivering an edge-to-edge sleeping surface with roughly 20% more usable space.

Pressure Relief for Joints

The plush layered comfort foams cradle hips and shoulders, ideal as the softest hybrid mattress for hip pain for sensitive sleepers.

Luxury High Profile

At 14 inches, this best high-profile hybrid mattress delivers a hotel-quality look and feel that pairs beautifully with modern foundations.

Certified Clean Foams

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

Key Mattress Benefits

7 Layers
Of Cooling
Comfort

This top layer is South Bay's proprietary Sofinity Foam, engineered with roughly twice the airflow of traditional foam for enhanced temperature regulation. The lightweight, open-cell structure contours effortlessly to the body while promoting healthy spinal alignment.

This layer adds plush, cooling gel contouring that cradles the body's curves. As a result, sleepers benefit from cushioned pressure relief at the shoulders and hips without overheating.

This middle layer bridges the plush comfort foams above and the supportive coil core below. It helps balance soft surface comfort with consistent structural lift through the body of the mattress.

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

This bottom layer is high-density reactive Sofinity foam that anchors the mattress and reinforces overall stability. It helps maintain consistent shape and performance for years of dependable use.

The exterior breathable stretch-knit mattress cover unzips for easy laundering and helps reduce allergens with regular washing. Its breathable design complements the Sofinity Foam and gel cooling system at the surface of the mattress.

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Sofinity foam is genuinely different from memory foam

I expected Sofinity foam to be a rebrand of standard memory foam. It isn't. The rebound is faster and the feel is more responsive - you sink in just enough without the slow-hold that memory foam creates. On a medium-soft mattress this matters a lot. You get cushion without feeling stuck. A real material innovation not a marketing label.

14 inches of medium-soft perfection

The depth on this mattress is immediately noticeable. Every layer has room to do its full job - the coils have real travel the Sofinity foam has genuine thickness and the medium-soft feel is well-calibrated throughout. Not just soft on top and firm underneath. It's a consistent medium-soft experience all the way through. South Bay got the layer balance exactly right.

Hybrid coils make the soft surface sleep cool

Soft mattresses trap heat because foam surrounds you more completely. The coil system in the Sofinity Hybrid Plus allows airflow that pure foam can't provide. Combined with the Sofinity foam which breathes better than memory foam I get the soft surface I love without the heat trap I hated. Finally solved a trade-off I thought was permanent.

Medium-soft runs closer to soft

The mattress quality is clearly excellent and the Sofinity foam is as described. My personal note is the medium-soft feel reads closer to soft to me. If you want a gentle plush surface you'll be very happy. If you're expecting a more neutral medium-soft balance be prepared for something that leans softer. Not a quality complaint - just a feel calibration note.

Side sleeper finally sleeping pain-free

Hip and shoulder pain from side sleeping on the wrong mattress had been my reality for two years. Medium-soft at 14 inches gives me the pressure relief I need while the hybrid coils keep my spine in proper alignment. Three weeks in the morning soreness is gone. This is the mattress that ended a two-year search.

HAVE QUESTIONS?

WE'VE GOT ANSWERS

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

Yes, the Sofinity Hybrid Plus is excellent for side sleepers. The medium-soft Sofinity Foam top combined with the gel memory foam comfort layer cradles the shoulders and hips where side sleepers need the most cushioning, while the pocketed coil core delivers the underlying support to keep the spine in healthy alignment.

Yes, a 14-inch mattress generally pairs best with deep-pocket or extra-deep-pocket fitted sheets. Standard fitted sheets are typically designed for mattresses up to about 12 inches deep, so deeper pockets help ensure a secure, wrinkle-free fit on this taller profile.

Sofinity Foam is South Bay's proprietary foam engineered with roughly twice the airflow of traditional memory foam. While both foams contour to the body, Sofinity Foam features a lighter, more open-cell structure that improves breathability, regulates temperature more effectively, and delivers a slightly more responsive feel than dense traditional memory foam.

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.

The mattress may take up to 72 hours to fully recover its shape after unboxing. You can sleep on it right away, as body heat and movement help speed the expansion process along.

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