Explore 68+ Inspiring Firm King Size Mattress In A Box Satisfy Your Imagination

The Zinus 12 Inch Gel-Infused Green Tea Memory Foam Mattress is one of the top choices for a firm king size mattress in a box. This mattress is designed to provide excellent support and comfort for a peaceful night's sleep. The gel-infused memory foam helps to regulate body temperature and keep you cool throughout the night, while the green tea extract helps to keep the mattress fresh and odor-free.

This mattress is also CertiPUR-US certified, ensuring that it is made without harmful chemicals and is safe for you and your family. The 12-inch thickness provides a medium-firm feel, perfect for those who prefer a slightly softer sleeping surface. And with its convenient delivery in a box, you can easily set up your new mattress in no time.

If you're looking for a combination of memory foam and innerspring support, then the Linenspa 10 Inch Memory Foam and Innerspring Hybrid Mattress is a great option. This mattress combines the pressure-relieving benefits of memory foam with the support of traditional innerspring coils.

The 10-inch thickness provides a medium-firm feel, making it suitable for various sleeping positions. The mattress is also hypoallergenic and CertiPUR-US certified, ensuring that it is free from harmful chemicals. And with its compact packaging in a box, you can easily maneuver and set up your new mattress in your desired room.

The Classic Brands Cool Gel 2.0 Ultimate Gel Memory Foam Mattress is a luxurious and supportive option for those who prefer a firm sleeping surface. This mattress features a 2-inch layer of gel-infused memory foam that helps to regulate body temperature and relieve pressure points. It also has a 6-inch layer of high-density polyfoam for added support and durability.

The Cool Gel 2.0 Ultimate Mattress is also hypoallergenic and CertiPUR-US certified, making it a safe and healthy choice for your bedroom. Its compact packaging in a box makes it easy to transport and set up in your desired location. Plus, its stylish design and breathable cover will make a great addition to any bedroom.

The Sealy 12-Inch Hybrid Bed in a Box with CopperChill is a top-of-the-line option for a medium-firm king size mattress. This mattress features a combination of memory foam and innerspring coils for the perfect balance of comfort and support. The copper-infused memory foam helps to keep you cool and promotes a cleaner sleep with its antimicrobial properties.

With its 12-inch thickness and medium-firm feel, this mattress is suitable for all sleeping positions and provides excellent motion isolation for couples. It also comes with a 10-year warranty, ensuring its durability and quality. And with its convenient delivery in a box, you can easily set up your new mattress in no time.

For those who prefer a firm sleeping surface, the Lucid 12 Inch Gel Memory Foam Mattress is a top choice. This mattress features a 3-inch layer of gel-infused memory foam for pressure relief and temperature regulation, along with a 9-inch layer of high-density support foam for added stability and comfort.

The Lucid Gel Memory Foam Mattress is also hypoallergenic and CertiPUR-US certified, ensuring that it is made without harmful chemicals. Its compact packaging in a box makes it easy to maneuver and set up in your desired room. And with its 25-year warranty, you can trust in the quality and durability of this mattress.

The Signature Sleep Memoir 12-Inch Memory Foam Mattress offers a medium-firm sleeping surface with its 2.5-inch layer of memory foam and 9.5-inch layer of high-density foam. This mattress is designed to relieve pressure points and provide proper spinal alignment for a comfortable and supportive sleep.

The Memoir Mattress is also CertiPUR-US certified, ensuring that it is made without harmful chemicals and is safe for your health. Its compact packaging in a box makes it easy to transport and set up in your desired room. And with its affordable price point, you can enjoy a high-quality mattress without breaking the bank.

The Ashley Furniture Signature Design - 12 Inch Chime Express Hybrid Innerspring Mattress offers the best of both worlds with its combination of memory foam and innerspring support. This mattress features a 1.5-inch layer of foam for pressure relief and a 0.75-inch layer of gel memory foam for temperature regulation, along with an 8-inch layer of individually wrapped coils for targeted support.

The Chime Express Hybrid Mattress is also hypoallergenic and CertiPUR-US certified, making it a safe and healthy option for your bedroom. Its compact packaging in a box makes it easy to transport and set up in your desired location. And with its unbeatable price point, you can enjoy a high-quality mattress without breaking the bank.

The Sweetnight King Mattress in a Box - 12 Inch Plush Pillow Top Hybrid Mattress offers a luxurious and supportive sleep experience with its combination of memory foam and innerspring coils. This mattress features a 3-inch layer of gel-infused memory foam for pressure relief and temperature regulation, along with a 3-inch layer of comfort foam and an 8-inch layer of individually wrapped coils for targeted support.

The Plush Pillow Top Hybrid Mattress is also CertiPUR-US certified, ensuring that it is made without harmful chemicals and is safe for your health. Its compact packaging in a box makes it easy to transport and set up in your desired room. And with its 10-year warranty, you can trust in the quality and durability of this mattress.

The Olee Sleep 13 inch Galaxy Hybrid Gel Infused Memory Foam and Pocket Spring Mattress is a top choice for a medium-firm king size mattress. This mattress features a combination of memory foam and pocket springs for pressure relief, support, and motion isolation. The gel-infused memory foam helps to regulate body temperature and keep you cool throughout the night.

The Galaxy Hybrid Mattress is also CertiPUR-US certified, ensuring that it is made without harmful chemicals and is safe for your health. Its compact packaging in a box makes it easy to transport and set up in your desired location. And with its affordable price point, you can enjoy a high-quality mattress without breaking the bank.

The Modway Jenna 14” Quilted Pillow Top Innerspring Mattress offers a plush and supportive sleep experience with its combination of memory foam and innerspring coils. This mattress features a 0.75-inch layer of memory foam for pressure relief and a 0.25-inch layer of gel-infused memory foam for temperature regulation, along with an 8.5-inch layer of individually wrapped coils for targeted support.

The Quilted Pillow Top Innerspring Mattress is also CertiPUR-US certified, ensuring that it is made without harmful chemicals and is safe for your health. Its compact packaging in a box makes it easy to transport and set up in your desired room. And with its stylish design and affordable price, you can upgrade your bedroom without breaking the bank.