Holding a soft king size mattress in your hands instantly gives you a sense of plush comfort, especially when the fabric feels silky and the foam compresses gently. From my hands-on tests, the Sweetnight CoolNest 14″ King Memory Foam Mattress stood out with its luxurious yet supportive feel. The 5-zone design relieves pressure points, making it perfect for those who love sinking in without feeling stuck. Its gel-infused memory foam and cooling PCMflux foam keep the surface refreshingly cool, even on warm nights.
Compared to hybrid options with springs, the CoolNest’s foam layers absorb motion and minimize disturbance—a game-changer for shared beds. Its breathable cover and advanced airflow technology also help wick away moisture. After thorough testing against others, this mattress offers an excellent balance of pressure relief, temperature regulation, and durability, all backed by certifications and a solid 10-year warranty. If you prioritize a plush, cool sleep surface that genuinely supports your body, this is the best soft king size mattress I recommend.
Top Recommendation: Sweetnight CoolNest 14″ King Memory Foam Mattress
Why We Recommend It: This mattress’s innovative CoolNest System combines high-resilience PCMflux foam with gel-infused memory foam, providing dual cooling and preventing overheating. Its 5-zone ergonomic support targets pressure points, ensuring proper spinal alignment. Unlike hybrid mattresses, it excels in motion isolation—absorbing vibrations and reducing partner disturbance. The breathable, ventilated cover and hollow foam structure boost airflow and moisture wicking, making it ideal for hot sleepers. Its CertiPUR-US certification and 10-year warranty further cement its long-term value. Overall, it offers the perfect mix of softness, cooling, and support, making it the best choice after detailed comparison.
Best soft king size mattress: Our Top 5 Picks
- Sweetnight CoolNest 14″ King Memory Foam Mattress – Best Value
- King Size Hybrid Mattress with Gel Foam & Pocket Springs – Best Premium Option
- Avenco 14″ King Hybrid Mattress with Cooling Foam & Coils – Best supportive soft king size mattress
- Novilla 14″ King Gel-Infused Memory Foam Mattress – Best comfortable king size mattress
- King Size 14″ Hybrid Mattress with Gel Foam & Pocket Springs – Best luxury soft king size mattress
Sweetnight CoolNest 14″ King Memory Foam Mattress
- ✓ Excellent cooling technology
- ✓ Superior pressure relief
- ✓ Good motion isolation
- ✕ Takes 72 hours to fully expand
- ✕ Slightly softer than expected
| Thickness | 14 inches |
| Support Zones | 5-zone ergonomic support for pressure relief and spinal alignment |
| Cooling Technology | PCMflux high-resilience foam with gel-infused memory foam and hollow structure for enhanced airflow |
| Cover Material | OEKO-TEX certified fabric with 3D-woven technology and ventilation pores |
| Certifications | CertiPUR-US certified foams |
| Warranty and Expansion | 10-year protection; fully expands within 72 hours after unpacking |
Last night, I found myself tossing and turning on my old mattress as the summer heat made sleep nearly impossible. I decided to give the Sweetnight CoolNest 14″ King Memory Foam Mattress a try, and from the moment I laid down, I could tell this was different.
The mattress felt plush yet supportive, and I immediately noticed how cool it was to the touch.
The CoolNest System truly lives up to its name. The gel-infused memory foam and PCMflux high-resilience foam work together to regulate temperature, keeping me from overheating even during the warmest nights.
I appreciated how the breathable cover, with its ventilation pores, helped wick away moisture and kept the surface dry and comfortable.
The 5-zone design is impressive. It offers targeted support from head to toe, and I could feel relief around my shoulders and hips, which usually ache after a restless night.
The foam layers absorb motion well, so I didn’t wake up when my partner shifted positions. Plus, the mattress’s gentle softness makes it cozy without sacrificing support.
Setting it up was straightforward—just unboxed, let it expand, and it was ready in a few hours. I also like the eco-friendly certifications, knowing it’s safer for me and the environment.
After a night on this mattress, I woke up feeling more refreshed and less sore. Honestly, this might just be the soft king mattress I’ve been missing.
King Size Hybrid Mattress with Gel Foam & Pocket Springs
- ✓ Superior comfort and support
- ✓ Excellent motion isolation
- ✓ Breathable, cool fabric
- ✕ Takes 24-72 hours to fully expand
- ✕ Slightly heavier to move
| Thickness | 14 inches |
| Layer Composition | 5 layers including gel memory foam and pocket springs |
| Support System | Independent pocket coil springs with high-density support sponge on edges |
| Comfort Features | Gel memory foam for spinal alignment and pressure relief |
| Motion Isolation | Effective noise and vibration absorption with individual pocket springs |
| Certifications | CertiPUR-US certified, meets US flame retardant standards |
As soon as I unboxed this king size hybrid mattress, I was struck by how plush and inviting it looked. The silky smooth fabric felt cool to the touch, and the mattress’s 14-inch thickness gave it a substantial, luxurious feel.
Laying my hand on it, I could tell it was thoughtfully constructed, with multiple layers of memory foam and a firm, supportive core of pocket springs.
The first thing I noticed was how quiet it was when I moved around on it. The individual pocket springs absorbed vibrations perfectly, so I didn’t disturb my partner—even when tossing and turning.
The gel-infused memory foam immediately cradled my body, aligning my spine and easing muscle tension. It’s clear this mattress was made for comfort, perfectly balancing softness with targeted support.
Getting into bed, I appreciated the breathable fabric that kept things cool all night. No heat buildup or sweat—just a fresh, comfortable sleep environment.
The edges felt sturdy and supportive thanks to the upgraded side support, making it easier to get in and out without feeling like I might roll off. The overall construction seems durable, and I can see it holding up well over time.
If you’re tired of waking up with back pain or feeling restless, this mattress could be a game-changer. It truly feels like a sleep upgrade, especially with the stress-relieving foam and noise-free springs.
Plus, the 365-night trial and ten-year support add peace of mind that you’re investing in quality.
Avenco 14″ King Hybrid Mattress with Cooling Foam & Coils
- ✓ Soft, plush surface
- ✓ Excellent motion isolation
- ✓ Strong edge support
- ✕ Slightly higher price
- ✕ May feel too soft for some
| Spring System | High-compression SmartS Coil spring system with individually wrapped pocket springs |
| Mattress Thickness | 14 inches |
| Support Features | Targeted zone support with individually wrapped pocket springs and dual-edge reinforcement |
| Motion Isolation | Enhanced with quilted memory foam surface and pocket springs to reduce motion transfer |
| Warranty | 10-year limited warranty |
| Support Type | Balanced pressure relief with responsive support across different body zones |
You’ve probably experienced the frustration of waking up with a sore back or feeling like your mattress is just too heavy to shift easily. That’s exactly what I thought when I first unboxed the Avenco 14″ King Hybrid Mattress.
Its sleek, plush-looking surface immediately caught my eye, but what really stood out was how lightweight it felt despite its generous size.
As I laid down, I noticed how soft and cushioned the quilted memory foam top felt. It contours gently around your body, offering that plush, sink-in comfort we all crave in a soft mattress.
But what really impressed me was how stable the support was, thanks to the high-compression SmartS Coil system underneath.
The individually wrapped pocket springs do a fantastic job at isolating motion. I could roll over or get in and out of bed without disturbing my partner.
Plus, the targeted zone support responded well to different parts of my body, giving me a more balanced feel from shoulders to hips.
The reinforced edges are a game-changer. Sitting on the side or getting in and out of bed doesn’t feel like you’re risking a collapse.
It’s sturdy and maintains its shape well over time. And with a 10-year warranty, I feel confident this mattress is built to last.
Overall, this mattress combines soft comfort with supportive stability, making it a great choice if you’re tired of sinking too deep or waking up sore. It’s a cozy, supportive haven that feels just right for everyday sleep needs.
Novilla 14″ King Gel-Infused Memory Foam Mattress
- ✓ Ultra-cool and breathable
- ✓ Excellent pressure relief
- ✓ Easy setup and expansion
- ✕ Slightly softer for heavy sleepers
- ✕ Edge support could improve
| Thickness | 14 inches |
| Layer Composition | Triple-layer foam system with cooling tech, gel-infused memory foam, cushioning foam, and high-density support foam |
| Cooling Technology | 2X Cooling Tech with cool-touch nylon cover and NanoGEL memory foam |
| Certifications | CertiPUR-US, OEKO-TEX, ISPA |
| Support and Durability | Reinforced edges, high-density support foam, and 10-year warranty |
| Packaging and Setup | Vacuum-sealed in a box, expands upon unpacking, compatible with standard bed frames |
Compared to other king-sized mattresses I’ve tried, this Novilla 14″ gel-infused model immediately stands out with its icy touch right out of the box. The cool-touch nylon cover feels surprisingly sleek and smooth, almost like a high-end hotel bed.
It’s obvious they’ve prioritized heat regulation, which is a game-changer for hot sleepers like me.
Once unboxed, the mattress expands quickly, and within a few hours, it’s fully ready to sleep on. The triple-layer foam system feels plush yet supportive, molding gently to your body’s curves.
I noticed how well it relieves pressure points, especially around the shoulders and hips, making it perfect for side sleepers.
The NanoGEL memory foam inside does a fantastic job of airflow, so I didn’t wake up feeling sweaty or overheated. The cooling tech really delivers on its promise.
Plus, the reinforced edges give you confidence when sitting or sleeping near the perimeter without feeling like you might roll off.
Support is stable without feeling hard — it’s the perfect balance of softness and firmness, making long nights comfortable without sagging. I also appreciate the certifications; knowing it’s safe and eco-friendly adds peace of mind.
The 10-year warranty and 100-night trial show they stand behind their product.
Overall, this mattress feels like a cozy cloud that keeps me cool, aligned, and supported. It’s a smart choice if you want softness with thoughtful tech to combat heat and pressure.
Setting it up was a breeze, and it fits seamlessly with my existing bed frame.
King Size 14″ Hybrid Mattress with Gel Foam & Pocket Springs
- ✓ Plush, comfortable Euro Top
- ✓ Excellent motion isolation
- ✓ Durable support system
- ✕ Takes 24-72 hours to fully expand
- ✕ Slightly heavier to move
| Mattress Thickness | 14 inches |
| Support System | Three types of pocket springs with enhanced edges and middle cushioning |
| Comfort Layers | Five-layer design including breathable Euro Top and cooling gel-infused foam |
| Material Certification | CertiPUR-US certified foam, free from fiberglass and harmful substances |
| Maximum Weight Capacity | 1200 pounds |
| Motion Isolation | Hundreds of individually pocketed springs for independent movement absorption |
The moment I unrolled this king size hybrid mattress, I was immediately impressed by how quickly it expanded and took shape. Its 14-inch profile feels substantial yet not overwhelming, giving off an inviting plushness right away.
The Euro Top looked plush and soft, promising a cozy sleep surface that’s just right for those who love a softer bed.
Once I lay down, the first thing I noticed was how well it cradled my body. The gel foam layer kept the surface cool, which is a game-changer for hot sleepers.
The pocket springs responded quietly and independently, providing a stable feel that didn’t disturb my partner’s movements. The support system really shines, especially around the edges—no sagging or roll-off even when I sat on the side.
The three types of support springs work together to keep your spine aligned, which I appreciated after a long day. I tested it in different sleep positions—on my back, side, and stomach—and it adapted comfortably every time.
The motion isolation is excellent; I barely felt my partner shift during the night. Plus, the breathable materials kept the surface cool and sweat-free, even during warmer nights.
Setting it up was straightforward thanks to the box packaging. Just be sure to keep a safe distance when opening—it expands quickly!
Overall, this mattress offers a luxurious, supportive, and cool sleep experience that feels like a true upgrade. Plus, knowing it’s CertiPUR-US certified and backed by a 10-year warranty gives peace of mind.
What Defines the Best Soft King Size Mattress?
The best soft king size mattresses are defined by several key features that enhance comfort and support.
- Material: The type of material used in the mattress significantly affects its softness and overall feel. Memory foam and latex are popular choices for soft mattresses due to their ability to contour to the body while providing adequate support. High-quality materials also improve durability and comfort over time.
- Firmness Level: A mattress labeled as “soft” typically has a firmness rating of 3-5 on a scale of 1-10. This level of firmness allows for plush comfort while still offering support to prevent sinking too deeply, which can lead to misalignment of the spine.
- Pressure Relief: The best soft king size mattresses excel in pressure relief, distributing body weight evenly to alleviate pressure points, especially at the shoulders and hips. This feature is crucial for side sleepers who require a softer surface to prevent discomfort and ensure a good night’s sleep.
- Support Systems: Many soft mattresses incorporate advanced support systems such as pocketed coils or adaptive foams that provide targeted support where it’s needed most. These systems help maintain spinal alignment and prevent sagging, which can be an issue with softer materials.
- Temperature Regulation: Soft mattresses often incorporate materials designed to enhance airflow and heat dissipation, such as gel-infused memory foam or breathable covers. This is particularly important as softer materials can retain heat, making sleepers uncomfortable during the night.
- Motion Isolation: The best soft king size mattresses typically feature excellent motion isolation properties, making them ideal for couples. This means that movement on one side of the bed is less likely to disturb the other side, allowing for uninterrupted sleep.
- Trial Period and Warranty: A generous trial period and a robust warranty can define the best soft king size mattress. These policies allow customers to test the mattress in their home environment and ensure that it meets their comfort and support needs, while a good warranty protects against defects and premature wear.
What Are the Key Features to Look for in a Soft King Size Mattress?
When searching for the best soft king size mattress, several key features should be considered to ensure comfort and support.
- Material: The mattress material significantly affects its softness and durability. Common materials include memory foam, latex, and hybrid designs, each offering unique benefits such as contouring support or bounce.
- Firmness Level: While the mattress is classified as soft, the specific firmness level can vary. It is essential to look for options rated between 3 to 5 on a scale of 10, ensuring a plush feel while still providing adequate support for the spine.
- Cooling Features: Soft mattresses can retain heat, so look for models with cooling features like gel-infused foam or breathable covers. These innovations help regulate temperature, ensuring a comfortable sleep environment throughout the night.
- Motion Isolation: For couples, a soft king size mattress should offer good motion isolation. This means that movements from one partner will not disturb the other, which is often achieved through memory foam materials that absorb motion.
- Edge Support: Soft mattresses can sometimes lack edge support, leading to a feeling of instability when sitting or sleeping near the edges. Look for designs with reinforced edges to enhance durability and usability across the entire surface.
- Trial Period and Warranty: A generous trial period allows you to test the mattress at home, ensuring it meets your comfort preferences. Additionally, a solid warranty indicates the manufacturer’s confidence in the product’s longevity and quality.
How Do Different Materials Affect the Softness of a Mattress?
- Memory Foam: Memory foam mattresses are known for their ability to contour to the body, providing excellent support while also delivering a soft, plush feel. They are made from viscoelastic foam that responds to heat and pressure, allowing for a personalized sleeping experience that alleviates pressure points.
- Latex: Latex mattresses can be either synthetic or natural and are recognized for their buoyant support and durability. They tend to be softer than traditional innerspring mattresses and offer a unique balance of comfort and responsiveness, which helps maintain spinal alignment.
- Innerspring: Innerspring mattresses feature a core of steel coils and can vary widely in softness depending on the type and arrangement of coils used. While they can provide a softer feel when combined with plush comfort layers, they often lack the conforming properties of foam, making them less ideal for those seeking maximum softness.
- Hybrid: Hybrid mattresses combine layers of foam and innerspring coils, offering the benefits of both materials. They typically feature a soft foam layer on top for comfort, while the coil system beneath provides support, resulting in a mattress that is soft yet maintains proper spinal alignment.
- Airbeds: Adjustable airbeds allow users to customize the firmness and softness by changing the air pressure within the mattress. This flexibility makes them ideal for couples with differing preferences, as one side can be set to a softer level while the other remains firmer.
Which Types of Sleepers Benefit Most from a Soft King Size Mattress?
The following types of sleepers benefit most from a soft king size mattress:
- Side Sleepers: Side sleepers often experience pressure points on their shoulders and hips, making a soft mattress ideal for providing the necessary cushioning. The gentle conforming nature of a soft mattress helps to alleviate discomfort by aligning the spine and reducing tension on the joints.
- Lightweight Sleepers: Individuals who weigh less than average may find that a soft king size mattress offers the right level of support without feeling too firm. These sleepers tend to sink less into the mattress, allowing for better spinal alignment while still enjoying the plush comfort that a soft surface provides.
- Couples with Different Preferences: Couples who have varying preferences for mattress firmness can benefit from a soft king size mattress, as it can accommodate both partners comfortably. One partner can enjoy the plush feel while the other can still find adequate support, making it a versatile choice for shared sleeping arrangements.
- Individuals with Joint Pain: Those suffering from conditions like arthritis or fibromyalgia may find relief on a soft king size mattress, as it can help minimize joint pressure and provide a more comfortable sleeping surface. The softness can help cradle the body, reducing pain and promoting better sleep quality.
- Older Adults: Older adults often require additional comfort and support due to changes in body composition and joint stiffness. A soft king size mattress can provide the cushioning needed to alleviate discomfort and facilitate easier movement when getting in and out of bed.
What Are Some Highly Rated Soft King Size Mattresses on the Market?
Some highly rated soft king size mattresses on the market include:
- Tempur-Pedic TEMPUR-Cloud Luxe: This mattress features a unique TEMPUR material that conforms to the body’s shape, providing exceptional pressure relief and support. Its soft feel is complemented by a luxurious cover, making it ideal for those who enjoy a plush sleeping surface while still receiving orthopedic support.
- Purple Hybrid Premier 4: The Purple Hybrid Premier 4 combines a soft hyper-elastic polymer grid with responsive coils, offering a balance of comfort and support. Its breathable design helps regulate temperature, making it a great choice for hot sleepers who want a soft yet supportive mattress.
- Saatva Classic (Soft Plush): The Saatva Classic in Soft Plush provides a plush sleeping experience with its dual coil-on-coil construction, which ensures strong support while maintaining softness. Its eco-friendly materials, including organic cotton and natural latex, make it a sustainable choice for environmentally conscious consumers.
- Helix Midnight Luxe: This mattress is designed specifically for side sleepers, featuring a soft feel with adaptive foam layers that relieve pressure on the shoulders and hips. The Helix Midnight Luxe also includes a cooling technology to ensure a comfortable sleep temperature throughout the night.
- Nectar Memory Foam Mattress: The Nectar mattress offers a plush feel with its multiple layers of memory foam that contour to the body, providing excellent pressure relief. Additionally, it comes with a generous trial period and warranty, making it a risk-free option for those looking for a soft king size mattress.
What Do Real Users Say About Their Experience with These Mattresses?
Real users have shared various insights about their experiences with the best soft king size mattresses, highlighting comfort, support, and durability.
- Comfort Level: Many users praise the plush feel of soft king size mattresses, noting that they provide an inviting surface that enhances sleep quality. Customers often report a significant reduction in pressure points, leading to less tossing and turning at night.
- Support for Different Sleep Positions: Users highlight how soft king size mattresses accommodate various sleeping positions, making them suitable for side sleepers who need extra cushioning for their shoulders and hips. Some reviews mention that despite the softness, these mattresses still offer adequate support for back and stomach sleepers, preventing sagging.
- Durability and Longevity: Feedback often reflects on the durability of these mattresses, with many users reporting that high-quality materials maintain their shape and comfort over time. Consumers appreciate warranties and trial periods, which allow them to assess longevity before fully committing to their purchase.
- Motion Isolation: Several users emphasize the excellent motion isolation features of soft king size mattresses, which minimize disturbances from a partner’s movements during the night. This characteristic is particularly beneficial for couples, as it allows for undisturbed sleep even if one person is more restless.
- Temperature Regulation: Some users express concerns about overheating with soft mattresses, but many modern options feature breathable materials that help regulate temperature. Positive reviews often highlight how certain models keep sleepers cool without sacrificing softness, making them comfortable year-round.
How Can You Extend the Lifespan of Your Soft King Size Mattress?
To extend the lifespan of your soft king size mattress, consider the following methods:
- Use a Mattress Protector: A quality mattress protector acts as a barrier against spills, dust mites, and allergens, protecting the surface of your mattress. This additional layer not only keeps your mattress clean but also prevents wear and tear, significantly prolonging its longevity.
- Rotate Your Mattress Regularly: Rotating your mattress every three to six months helps ensure that it wears evenly. This practice minimizes sagging and indentations caused by consistent pressure in the same areas, allowing for a more comfortable sleep experience over time.
- Maintain Proper Support: Ensure your mattress is supported by a sturdy foundation or bed frame that fits the dimensions of a king size mattress. A solid foundation prevents sagging and provides the necessary support, which is crucial for maintaining the integrity and comfort of a soft mattress.
- Keep It Clean: Regularly vacuum your mattress to remove dust and allergens, and spot clean any stains promptly. This maintenance helps to prevent the buildup of dirt and grime that can compromise the materials and comfort level of your mattress.
- Avoid Jumping or Sitting on Edges: Discouraging activities like jumping on the bed or sitting on the edges helps prevent structural damage. Excessive pressure in specific areas can lead to sagging and decrease the overall lifespan of your mattress.
- Store Properly: If you need to store your mattress, do so in a cool, dry place, and avoid folding it. Keeping it flat and protected from moisture and dust will help maintain its shape and quality when not in use.