Shopping for a new mattress used to mean choosing between soft or firm, but today's best mattresses offer so much more. At SweetNight, we've built features like cooling foam, targeted support zones, and breathable covers into our mattresses to help you sleep better. Our SweetNight mattress collection, including the popular CoolNest mattress, tackles real sleep problems like getting too hot at night, waking up with back pain, or feeling your partner move.

Cooling Technology That Actually Works

Waking up hot and sweaty doesn't just feel uncomfortable—it interrupts your sleep and leaves you groggy the next morning. If you're searching for the best cooling mattress for hot sleepers or best mattress for night sweats, we've built cooling features into our mattresses that stop heat from getting trapped between you and the bed.

CoolNest™ 3D Weaving & Micro-Vents

SweetNight CoolNest^TM Mattress has a specially designed cover that sets it apart. We weave the fabric in a 3D pattern with 10,000 tiny vents throughout. This design moves 35% more air than regular mattress covers, so heat can escape instead of building up around your body. The fabric feels cool when you first lie down and stays dry all night—no more waking up on a clammy surface.

PCMflux™ Temperature-Regulating Foam

Just under the CoolNest cover, you'll find our PCMflux™ foam layer—making this the best mattress with PCMflux™ technology for temperature regulation. This foam contains special PCM particles that work like a thermostat for your bed. When you get warm, these particles absorb the heat. When you cool down, they release it. The foam also has a hollow structure with more air pockets than standard foam, making it three times more breathable. It's basically temperature control built right into your mattress.

Gel-Infused Memory Foam Benefits

Five of our mattresses—CoolNest, Twilight, Starry Night, Gloaming, and Island—use gel-infused memory foam, making them among the best memory foam mattresses for temperature control. We mix cooling gel particles into the foam, which draws heat away from your body and spreads it out across the mattress. This means you get the pressure relief and body-hugging comfort of memory foam without sleeping hot. You also avoid that "sinking in" feeling because the gel keeps the foam responsive and supportive.

Pressure Relief & Support Systems

Your body doesn't weigh the same everywhere—your hips and shoulders need more support than your legs or head. Good pressure relief means the mattress supports each part of your body differently, so you wake up without aches and pains.

5-Zone Ergonomic Support Explained

The CoolNest mattress divides its support into five distinct zones that match how your body is shaped:

The base foam layer includes 9 comfort bars that align with different parts of your body from head to toe.
Your shoulders and hips get extra cushioning to prevent soreness, while your lower back receives firmer support.
Each zone provides the right support level, so your body stays comfortable without constantly shifting.
The targeted lower back support keeps your spine in a neutral position throughout the night.

3-Zone Pocket Coil Technology

The Starry Night and Island hybrid mattresses use individually wrapped coils arranged in three support zones:

The coils under your hips are firmer to prevent sagging in your body's heaviest area.
The coils under your shoulders and legs flex more easily to relieve pressure.
The middle section provides extra reinforcement for your lower back.
Each coil moves independently, so you won't feel your partner moving during the night.

Contouring Curve™ Body-Fit Design

The Prime Memory Foam Mattress uses continuous curves cut into the foam instead of flat layers:

The curved foam follows the contours of your body from head to toe, reducing pressure points.
Flip and rotate the mattress to choose from four different comfort levels.
The ergonomic curves provide continuous support along your spine.
The body-fit design distributes your weight evenly instead of creating pressure hotspots.

These three support systems tackle pressure relief in different ways, so you can choose the approach that matches your body type and sleep style.

A woman tests the supportive foam and breathable cover of a mattress featuring 2025's latest pressure-relief technology.

Multi-Layer Foam Construction

Mattresses aren't just one solid piece of foam—they're built with multiple layers that each serve a specific purpose. The type, density, and arrangement of these layers determine how the mattress feels and how long it lasts.

High-Density Foam: Density Ratings Explained

Foam density tells you how much material is packed into each layer, and it directly affects durability and support. Here's what you need to know:

The Prime mattress uses foam with density ratings from 40 to 70, meaning more material is packed into each layer than cheaper alternatives.
Higher density foam resists sagging and permanent body impressions that ruin cheaper mattresses after a year or two.
The foam fully expands to its original shape after being vacuum-sealed for shipping.
CertiPUR-US certification means the foam has been tested for durability, performance, and safety standards.
High-density foam costs more upfront but maintains its support for the full 10-year warranty period.

Transition & Comfort Foam Layers

Every SweetNight mattress includes transition and comfort foam layers that sit between the top surface and the support base:

Transition foam creates a gradual shift from soft to firm so you don't feel a jarring hard layer.
These layers spread your weight across the surface to prevent pressure buildup in any single spot.
Comfort foam hugs your body while firmer layers below keep your spine aligned.
The transition layers prevent you from sinking through to the firm base, which would be uncomfortable.
These layers allow the mattress to adjust when you shift positions without feeling bouncy or unresponsive.

Bamboo Charcoal Foam Benefits

The Starry Night, Gloaming, and Island hybrid mattresses include a bamboo charcoal foam layer:

The material naturally resists allergens, making it better for people with sensitivities.
Bamboo charcoal's antimicrobial properties prevent bacteria and microbe growth over years of use.
The charcoal traps and neutralizes odors instead of just masking them.
It wicks away moisture, adding another cooling benefit for people who sleep warm.
Bamboo charcoal is a natural material without chemical treatments that can off-gas or break down.
These foam layers work together to create a mattress that's comfortable, supportive, and lasts for years.

Hybrid Mattress Technology

Hybrid mattresses use both foam layers and innerspring coils to give you benefits that either material alone can't provide. You get pressure relief from the foam and support with bounce from the springs. Four of our mattresses—Twilight, Starry Night, Gloaming, and Island—use this hybrid design to create a balanced sleep surface.

How Pocketed Coils Eliminate Motion Transfer

The coil system makes or breaks a hybrid mattress, and all four of our hybrids use individually pocketed coils. Each coil sits in its own fabric sleeve, separate from the others. When you press down on one coil, it compresses without affecting the coils around it. This matters most at night when your partner moves. If they roll over or get up, only the coils directly under them respond. The coils under you stay in place, so you don't feel their movement. For couples with different sleep schedules, this makes a real difference. The Twilight Hybrid Mattress uses this wrapped coil system, and we add multiple foam layers on top that catch any remaining movement before it reaches you.

When to Choose Hybrid vs. All-Foam

Your choice between a hybrid and an all-foam mattress depends on how you sleep and what you value most in a bed.

Choose a hybrid if you:

Want a mattress with more bounce that makes it easier to change positions during the night
Sleep hot and need extra airflow—the coil layer allows air to circulate freely through the mattress
Sleep in multiple positions throughout the night and need responsive support
Want stronger edge support so you can sit or sleep near the side without feeling unstable
Share your bed with a partner and need excellent motion isolation from the individually wrapped coils
Prefer a mattress that feels more like a traditional bed with some spring to it

Choose all-foam if you:

Want maximum pressure relief with a closer body-conforming feel
Need deep contouring for side sleeping or significant back pain relief
Prefer complete motion isolation without any coil movement at all
Want a lighter mattress that's easier to move or rotate
Have a tighter budget—all-foam mattresses typically cost less than hybrids
Want the Prime's unique flippable design that gives you four different firmness levels to choose from
Sleep alone and don't need the extra features that hybrids provide for couples

A close-up of the SweetNight CoolNest mattress, showcasing its advanced cover and cooling mattress technology for 2025.

Breathability & Airflow Design

How well air moves through your mattress directly affects your sleep temperature. When heat gets trapped between your body and the mattress, you wake up sweaty and uncomfortable.

Advanced Cover Fabric Technology

The mattress cover is your first defense against overheating. We've designed two specialized covers that actively improve airflow.

CoolNest™ Cover

CoolNest^TM Mattress uses a 3D weaving technique with 10,000 micro-vents throughout the fabric. The 3D structure creates channels that move air across the mattress surface, delivering 35% more airflow than standard covers. The fabric feels cool to the touch and stays dry throughout the night.

StarSea™ Cover

Starry Night mattress features our StarSea™ design with 3D weaving and hundreds of small openings woven into the fabric. These openings let heat escape more efficiently while keeping the fabric soft and comfortable.

How Foam Layers Promote Airflow

Beyond the cover, the foam layers inside every SweetNight mattress help regulate temperature:

Open-Cell Foam Structure: All our mattresses use open-cell foam with interconnected air pockets. When you move during sleep, these pockets compress and release, pumping air through the foam and preventing heat buildup.
Gel-Infused Foam: The CoolNest, Twilight, Starry Night, Gloaming, and Island include gel-infused memory foam. The gel particles absorb heat and spread it across a larger area instead of letting it concentrate in one spot.
PCMflux™ Hollow Structure (CoolNest): The CoolNest's PCMflux™ foam has a hollow structure with three times more air space than conventional foam, allowing heat to escape faster.
Hybrid Airflow Advantage: Our four hybrid mattresses have pocketed coil layers that act like ventilation chambers. Air moves freely through the spaces between coils, pulling heat away from the foam layers above. This is why hybrids typically sleep cooler than all-foam mattresses.

Innovative Customization Features

Not everyone sleeps the same way, and your comfort needs can change over time. We've designed features that let you adjust your mattress instead of being stuck with one feeling forever.

Flippable 4-in-1 Firmness Options

You can choose from four distinct hardness levels in one bed with the Prime memory foam mattress. Four layers of foam with varying densities are placed on top of one another. You may create four different feelings by flipping and rotating the mattress to vary which layers you sleep on. Simply spin or flip it to test a different setting if it seems too firm or too soft. The issue of making an online purchase without knowing if you'll like the firmness is resolved by this. The Prime is particularly useful for couples who desire varying firmness without separate beds or for individuals with back trouble who need to test out different support levels.

Why Medium Firmness Works Best

Since it suits the majority of sleepers, the CoolNest^TM Mattress uses medium firmness. It cushions your shoulders and hips while you sleep on your side, and it maintains a straight spine when you sleep on your back or stomach. The 5-zone support system of the CoolNest modifies the hardness in different parts of the body, making it softer where pressure is needed and harder where you're heavier.

Which Mattress Fits Your Sleep Style?

Different sleep problems need different solutions. Here's which mattress works best for common issues.

Best for Hot Sleepers

If you're searching for the best cooling mattress for hot sleepers, the CoolNest^TM Mattress is designed specifically for people who overheat at night. It uses three cooling features: the CoolNest™ cover with 10,000 micro-vents moves 35% more air, PCMflux™ foam absorbs heat when you warm up, and gel-infused memory foam pulls heat away from your body. This combination makes the surface feel up to 8° cooler than regular mattresses.

Best for Back Pain Relief

If you're wondering what is the best mattress for back problems, the CoolNest^TM Mattress provides targeted support designed specifically for back pain relief. It's particularly effective as the best mattress for back pain with cooling features because it addresses both spinal alignment and temperature regulation simultaneously. It has 5 support zones with 9 comfort bars placed to match different body areas. Your lower back gets firmer support to keep your spine aligned, while your shoulders and hips get softer cushioning to prevent pressure buildup.

Best for Couples

When shopping for the best mattress for couples, the Island Hybrid Mattress handles all the unique challenges of sharing a bed. It's especially valuable as the best cooling mattress for couples with back pain because it combines motion isolation, temperature control, and ergonomic support in one design. Each coil is wrapped separately and moves on its own, so you won't feel your partner shifting during the night. Multiple foam layers absorb any remaining movement. The 3-zone coil system also strengthens the edges so you can use the full mattress surface without feeling like you'll roll off.

Best for Combination Sleepers

The Prime Memory Foam Mattress works for people who change positions often. You can flip and rotate it to get four different firmness levels, helping you find what feels comfortable on your back, side, or stomach. The Contouring Curve™ design supports your body in any position without making you feel stuck when you want to move.

Select the Ideal SweetNight Mattress Based on Your Sleep Preferences

Every SweetNight mattress has characteristics that effectively address particular sleep issues, whether it's the CoolNest^TM Mattress for hot sleepers or one of our hybrids for couples. Use our risk-free 100-night trial to test it out in your own bedroom. You may rest easy knowing that you made the proper decision because every model comes with a 10-year warranty and certified safe materials.