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South Bay
South Bay Essentials 6 Inch Firm Memory Foam Twin Mattress

South Bay Essentials 6 Inch Firm Memory Foam Twin Mattress

Best price now

$299.00at Cloudy MattressChecked 13 h ago

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Price facts

  • Lowest price today: $299.00 at Cloudy Mattress (checked Nov 11, 2026).

Our take on the South Bay Essentials 6 Inch Firm Memory Foam Twin Mattress

The South Bay Essentials 6 Inch is a thin memory foam twin built for places a full mattress won't fit: sofa beds, trundles, bunks and RV corners. Its 1-inch gel-infused memory foam top sits over 2 inches of transition foam and 3 inches of denser base foam, and the whole thing flexes enough to fold into most sofa-bed mechanisms. That makes it a niche pick rather than a daily sleeper. Thin foam twins like this trade long-term support for portability, and owners of similar 6-inch mattresses often report they soften faster than thicker beds. It suits guest setups and light use, not a main bed for a heavy adult.

Best forSofa beds and convertible couchesBunk beds and trundlesGuest rooms and vacation rentalsKids' first beds and light sleepers
Pros
  • 6-inch profile clears low bunk rails and trundle frames
  • Folds into most sofa-bed mechanisms and holds its shape
  • Gel-infused top layer and cooling cover aim at heat buildup
  • Three foam layers give more structure than a single slab
  • Twin size fits tight spaces a standard mattress can't
Cons
  • Thin foam gives limited support for heavier adults
  • Memory foam softens and can bottom out over time
  • Little edge support on a 6-inch build
  • Not for shoppers wanting a firm, spring-like feel

South Bay Essentials 6 Inch Firm Memory Foam Twin Mattress prices at every store

  • Cloudy MattressNew

    In stock

    $299.00Checked 13 h ago
    Visit Cloudy Mattress

South Bay Essentials 6 Inch Firm Memory Foam Twin Mattress price history

Lowest price we've seen: $299.00 on Nov 11 at Cloudy Mattress. Tracked across 1 store since Nov 11.

What reviewers say

Owners of thin 6-inch memory foam twins generally treat them as space-savers for sofa beds and bunks. They like the low profile and the foldability, and many find the gel top sleeps cooler than plain foam. The common complaint is that the foam softens and loses support sooner than a thicker mattress.

What people mention
  • ProfilePraisedOwners like that the 6-inch height fits bunks, trundles and sofa beds.
  • FoldabilityPraisedIt folds into sofa-bed mechanisms and springs back into shape.
  • CoolingMixedThe gel-infused top sleeps cooler than plain foam for some, but others still find it warm.
  • DurabilityCriticisedReviewers report the foam softens and bottoms out sooner than thicker mattresses.
  • SupportCriticisedHeavier sleepers say 6 inches of foam is not enough support.

From Cloudy Mattress

  • Low 6-inch profile fits sofa beds, trundles, bunk beds and tight spaces
  • Flexible enough to fold into most sofa-bed mechanisms while holding its shape
  • 1 inch gel-infused memory foam surface promotes breathability and draws heat away
  • Cooling cover works with the gel-infused top layer to keep the surface comfortable
  • 2 inches of Ridge Foam transition balances cushioning with support
  • 3 inches of Ridge Base Foam reinforce the structure for repeated folding and storing
Sizes
Twin, Full, Queen, RV Short Queen, RV Short King, RV Bunk
Materials
1 inch gel-infused memory foam, 2 inches Ridge Foam, 3 inches Ridge Base Foam; cooling cover
Fit
Firm feel; designed to fit inside most sofa-bed furniture, trundles and bunk beds
Sizing
Firm feel suits back and stomach sleepers; side sleepers needing deep shoulder and hip cushioning would be better served by a thicker plush model. Check your so
Guarantee
10 Year Warranty; comes with full manufacturer coverage as an authorized South Bay dealer
Shipping
Free USA Wide Delivery; ships roll-packed, compressed and boxed
Size chart
SizeDimensions
Twin38" x 75"
Twin XL38" x 80"
Full54" x 75"
Queen60" x 80"
King76" x 80"

About the South Bay Essentials 6 Inch Firm Memory Foam Twin Mattress

This is a 6-inch firm memory foam mattress in a twin size. Its low profile is designed to fit sofa beds, trundles, bunk beds and other tight spaces. It is flexible enough to fold into most sofa-bed mechanisms and hold its shape.

The mattress has three foam layers under a cooling cover. The top layer is 1 inch of gel-infused memory foam that promotes breathability and draws heat away. Below it, 2 inches of Ridge Foam balance cushioning with support. The bottom layer is 3 inches of Ridge Base Foam, which reinforces the structure for repeated folding and storing.

The feel is firm, which suits back and stomach sleepers. Side sleepers who need deep shoulder and hip cushioning may prefer a thicker, plush model.

Size
Twin
Thickness
6 inches
Feel
Firm
Comfort layer
1 inch gel-infused memory foam
Transition layer
2 inches Ridge Foam
Base layer
3 inches Ridge Base Foam
Cover
Cooling cover
Best for
Back and stomach sleepers
Fits
Most sofa beds, trundles and bunk beds
Other sizes
Full, Queen, RV Short Queen, RV Short King, RV Bunk

Specifications

Size
Twin

Questions and answers

Is a 6-inch mattress thick enough for an adult?
For occasional guest use, yes. For nightly sleeping by a heavier adult, it is thin, and the foam will compress faster than an 8- or 10-inch mattress.
Will it fit a standard sofa bed?
It is flexible enough to fold into most sofa-bed mechanisms, but check your frame's mattress thickness limit first. Some mechanisms are rated for 4 to 6 inches.
Does the gel-infused foam actually sleep cool?
It helps compared with plain memory foam, but it is still foam with limited airflow. Hot sleepers should not expect the cooling of a hybrid or innerspring.
What size is it?
This is a Twin. Measure your bunk, trundle or sofa bed before ordering, since twin and twin XL are not interchangeable.
Does it need a box spring?
No. It works on a slatted frame, platform, bunk base or sofa-bed deck. A solid, flat surface gives the thin foam the most support.
How firm is it?
It is a medium-soft memory foam feel. The top layer cradles, and the base layers add some pushback, but it is not a firm mattress.
Where is the South Bay Essentials 6 Inch Firm Memory Foam Twin Mattress cheapest?
At Cloudy Mattress, for $299.00, as of our latest check.