Looking for a high-quality king mattress at an affordable price? Look no further than the Zinus Ultima Comfort Memory Foam 12 Inch King Mattress. This bed in a box offers the perfect balance of comfort and support, all for just $399. Featuring a 3-inch layer of memory foam, this mattress conforms to your body and relieves pressure points while you sleep. The 2-inch comfort foam layer provides additional cushioning, while the 7-inch base layer offers firm support. The result? A restful night's sleep without breaking the bank. But the benefits don't stop there. The Zinus Ultima Comfort Memory Foam 12 Inch King Mattress also comes with a soft, knitted jacquard cover that is not only comfortable but also easy to remove and wash. So why spend thousands of dollars on a new mattress when you can get the same level of comfort and support with the Zinus Ultima Comfort? With its affordable price and convenient bed in a box delivery, this king mattress is a top choice for anyone on a budget.1. Zinus Ultima Comfort Memory Foam 12 Inch King Mattress | Bed in a Box | $399
For those who prefer a more traditional feel, the Linenspa 8 Inch Memory Foam and Innerspring Hybrid King Mattress is the perfect choice. This medium-firm mattress combines the support of innerspring coils with the comfort of memory foam for a truly restful sleep. The top layer of memory foam conforms to your body, reducing pressure points and promoting proper spinal alignment. The 1.5-inch layer of comfort foam provides additional cushioning, while the 6-inch layer of heavy-gauge steel coils offers firm support. This king mattress also features a soft quilted cover for added comfort and a sleek design. And at just $399, it's an affordable option for anyone looking for a comfortable and durable mattress.2. Linenspa 8 Inch Memory Foam and Innerspring Hybrid Medium-Firm Feel King Mattress | $399
Stay cool and comfortable all night long with the Classic Brands Cool Gel Ventilated Gel Memory Foam 10-Inch King Mattress. This mattress features a 2-inch layer of gel-infused memory foam that helps regulate temperature and keep you cool while you sleep. The 2-inch comfort foam layer provides additional cushioning, while the 6-inch base layer offers firm support. This combination of materials creates a medium-firm feel that is perfect for all types of sleepers. In addition to its cooling properties, this king mattress is also hypoallergenic and resistant to mold, bacteria, and dust mites. It also comes with a soft, knit cover that is easy to remove and wash for added convenience. For just $399, the Classic Brands Cool Gel Ventilated Gel Memory Foam 10-Inch King Mattress offers the perfect blend of comfort, support, and temperature regulation for a restful night's sleep.3. Classic Brands Cool Gel Ventilated Gel Memory Foam 10-Inch King Mattress | $399
Experience the luxurious comfort of the Signature Sleep Memoir 12-Inch Memory Foam King Mattress. This mattress is made with a top layer of 3.5 inches of memory foam, which conforms to your body and relieves pressure points. The 8.5-inch base layer of high-density foam provides firm support, while the soft, knit fabric cover adds an extra layer of comfort. This combination of materials creates a medium-firm feel that is perfect for all sleep positions. The Signature Sleep Memoir is also CertiPUR-US certified, meaning it is made without harmful chemicals and is safe for you and the environment. And at just $399, it's an affordable option for those looking for a high-quality memory foam mattress.4. Signature Sleep Memoir 12-Inch Memory Foam King Mattress | $399
If you're looking for a king mattress that offers both comfort and support, the Olee Sleep 10 Inch Gel Infused Layer Top Memory Foam King Mattress is a top choice. This mattress features a 1-inch layer of gel-infused memory foam that helps regulate temperature and keep you cool while you sleep. The 1-inch comfort foam layer provides additional cushioning, while the 8-inch base layer of high-density foam offers firm support. The result is a medium-firm feel that is perfect for all sleep positions. In addition to its cooling properties, this king mattress is also hypoallergenic and resistant to mold, bacteria, and dust mites. It also comes with a soft, knit cover that is easy to remove and wash for added convenience. For just $399, the Olee Sleep 10 Inch Gel Infused Layer Top Memory Foam King Mattress offers a comfortable and supportive sleep experience at an affordable price.5. Olee Sleep 10 Inch Gel Infused Layer Top Memory Foam King Mattress | $399
Upgrade your sleep with the Ashley Furniture Signature Design 12 Inch Chime Express Hybrid Innerspring King Mattress. This hybrid mattress combines the benefits of both innerspring coils and memory foam for the ultimate sleep experience. The top layer of gel-infused memory foam conforms to your body and helps regulate temperature, while the 2-inch comfort foam layer provides additional cushioning. The 8-inch pocketed coils offer firm support and reduce motion transfer, ensuring a restful night's sleep. This king mattress also features a hypoallergenic cover that is easy to remove and wash. And at just $399, it's an affordable option for anyone looking for a comfortable and durable mattress.6. Ashley Furniture Signature Design - 12 Inch Chime Express Hybrid Innerspring King Mattress | $399
Experience the perfect combination of comfort and support with the Modway Aveline 10 Inch Gel Infused Memory Foam King Mattress. This mattress features a 2-inch layer of gel-infused memory foam that conforms to your body and helps regulate temperature. The 2-inch comfort foam layer provides additional cushioning, while the 6-inch base layer of high-density foam offers firm support. This combination creates a medium-firm feel that is perfect for all sleep positions. In addition to its cooling properties, this king mattress is also hypoallergenic and resistant to mold, bacteria, and dust mites. It also comes with a soft, knit cover that is easy to remove and wash for added convenience. For just $399, the Modway Aveline 10 Inch Gel Infused Memory Foam King Mattress offers the perfect balance of comfort and support for a restful night's sleep.7. Modway Aveline 10 Inch Gel Infused Memory Foam King Mattress | $399
Indulge in luxury with the Sweetnight 12 Inch Plush Pillow Top King Mattress. This mattress features a 3-inch layer of gel-infused memory foam that conforms to your body and helps regulate temperature. The 3-inch comfort foam layer provides additional cushioning, while the 6-inch high-density foam layer offers firm support. The result is a medium-firm feel that is perfect for all sleep positions. But what sets this king mattress apart is its pillow top layer, which adds an extra layer of plush comfort. This mattress also comes with a hypoallergenic cover that is easy to remove and wash for added convenience. For just $399, the Sweetnight 12 Inch Plush Pillow Top King Mattress offers a luxurious sleep experience without breaking the bank.8. Sweetnight 12 Inch Plush Pillow Top King Mattress | $399
Sleep comfortably all night long with the Classic Brands Cool Gel and Ventilated Memory Foam 12-Inch King Mattress. This mattress is designed with a 2-inch layer of gel-infused memory foam that helps regulate temperature and keep you cool while you sleep. The 2-inch comfort foam layer provides additional cushioning, while the 8-inch base layer of high-density foam offers firm support. The result is a medium-firm feel that is perfect for all sleep positions. In addition to its cooling properties, this king mattress is also hypoallergenic and resistant to mold, bacteria, and dust mites. It also comes with a soft, knit cover that is easy to remove and wash for added convenience. For just $399, the Classic Brands Cool Gel and Ventilated Memory Foam 12-Inch King Mattress is a top choice for those looking for a comfortable and supportive sleep experience.9. Classic Brands Cool Gel and Ventilated Memory Foam 12-Inch King Mattress | $399
Experience the benefits of green tea with the Zinus Green Tea Memory Foam 12 Inch King Mattress. This mattress features a top layer of memory foam infused with green tea extract, which helps eliminate odors and maintain freshness. The 2-inch comfort foam layer provides additional cushioning, while the 3-inch airflow high-density foam layer offers breathability and support. The 7-inch base layer of high-density foam provides firm support, creating a medium-firm feel that is perfect for all sleep positions. This king mattress also comes with a soft, knit jacquard cover that is not only comfortable but also easy to remove and wash. And at just $399, it's an affordable option for those looking for a comfortable and eco-friendly mattress. In conclusion, a comfortable and supportive king mattress doesn't have to break the bank. With these top 10 picks of mattresses under $400, you can enjoy a restful night's sleep without compromising on quality or your budget. So why wait? Upgrade your sleep today and experience the difference for yourself.10. Zinus Green Tea Memory Foam 12 Inch King Mattress | $399