Best Of 65+ Stunning King Size Firm Mattresses Voted By The Construction Association

The Sealy Response Performance 14-Inch Cushion Firm Euro Pillow Top Mattress is a top pick for those in search of a high-quality, firm mattress. Made by one of the most trusted brands in the industry, Sealy, this mattress offers the perfect balance of comfort and support.

The 14-inch cushion firm euro pillow top design provides just the right amount of cushioning for a restful night's sleep, while still maintaining a firm feel. The added euro pillow top also helps to relieve pressure points, making it a great choice for those with back pain or joint issues.

This mattress is constructed with Sealy's exclusive Posturepedic Technology, which targets the heaviest part of your body to provide reinforced support where you need it most. This ensures proper spinal alignment and helps to prevent tossing and turning throughout the night.

With its high-quality materials and expert craftsmanship, the Sealy Response Performance 14-Inch Cushion Firm Euro Pillow Top Mattress is built to last and is backed by a 10-year warranty. It's no wonder it's a top choice for those looking for a firm, yet comfortable, mattress.

For those who prefer a firmer feel, the Serta Perfect Sleeper Select Kleinmon II 13.25-Inch Firm Mattress is an excellent option. Serta is known for their high-quality mattresses and this one is no exception.

The Kleinmon II features a 13.25-inch firm design with a layer of Serta's Cool Twist Gel Memory Foam, which provides excellent pressure relief and helps to regulate body temperature for a more comfortable sleep. The firm support is provided by Serta's exclusive 886 Custom Support Innerspring, which is designed to provide exceptional support while also reducing motion transfer.

In addition to its comfort and support features, this mattress is also designed with Serta's FireBlocker System, which meets the federal flammability standard for added peace of mind. It also comes with a 10-year warranty, so you can rest assured that you're making a wise investment.

The Beautyrest Silver BRS900 13.75-Inch Extra Firm Mattress is a top contender for those seeking an extra firm sleeping surface. This mattress features Beautyrest's exclusive DualCool Technology, which works to keep you cool and comfortable throughout the night.

The BRS900 also boasts Beautyrest's proprietary Advanced Pocketed Coil Technology, which provides exceptional support and helps to reduce motion transfer. The extra firm feel of this mattress is achieved through multiple layers of high-density foam, ensuring a firm and supportive sleep experience.

With its sturdy construction and advanced technologies, the Beautyrest Silver BRS900 13.75-Inch Extra Firm Mattress is a great choice for those looking for a long-lasting, extra firm mattress.

When it comes to memory foam mattresses, Tempur-Pedic is one of the most trusted brands. The TEMPUR-ProAdapt 12-Inch Firm Mattress is a top-rated option for those in search of a firm and supportive memory foam mattress.

This mattress features Tempur-Pedic's advanced TEMPUR-APR+ material, which provides a firm and adaptive feel. It also has a SmartClimate Dual Cover System, which is designed to keep you cool and comfortable throughout the night.

The TEMPUR-ProAdapt also comes with a 10-year warranty and a 90-night trial period, allowing you to try it out and make sure it's the right fit for you. With its superior comfort and support, this mattress is a top choice for those looking for a firm memory foam option.

For those who want the ultimate luxury in their firm mattress, the Stearns & Foster Estate Rockwell Luxury Firm Euro Pillow Top Mattress is a top pick. This mattress is handcrafted with the highest quality materials and features a 15-inch luxury firm euro pillow top design.

The Estate Rockwell is constructed with Stearns & Foster's exclusive IntelliCoil Advanced technology, which provides exceptional support and helps to reduce motion transfer. The added euro pillow top adds an extra layer of comfort and pressure relief, making it a great choice for those with back pain or joint issues.

With its luxurious feel and top-of-the-line construction, the Stearns & Foster Estate Rockwell Luxury Firm Euro Pillow Top Mattress is sure to provide a restful and comfortable night's sleep.

If you're looking for a firm mattress that still provides a plush and luxurious feel, the Simmons Beautyrest Black K-Class Ultra Plush Pillow Top Mattress is a top contender. This mattress features a 17.25-inch ultra plush pillow top design that provides the perfect combination of softness and support.

The K-Class Ultra Plush is constructed with Beautyrest's exclusive T3 Pocketed Coil Technology, which is designed to support your body while also reducing motion transfer. Its added layers of gel memory foam and micro coils provide exceptional pressure relief and contouring support.

The Simmons Beautyrest Black K-Class Ultra Plush Pillow Top Mattress is backed by a 10-year warranty and is a great choice for those who want a firm mattress with a plush and luxurious feel.

The Serta iComfort CF4000 13-Inch Firm Mattress is another excellent option for those in search of a firm and comfortable sleep surface. This mattress features Serta's exclusive Max Cold Cover, which is cool to the touch and helps to regulate body temperature throughout the night.

The CF4000 also has Serta's Carbon Fiber Memory Foam, which provides exceptional support and helps to dissipate heat for a cooler sleep experience. The added layer of gel memory foam also helps to relieve pressure points and provide a comfortable sleeping surface.

With its advanced technologies and firm feel, the Serta iComfort CF4000 13-Inch Firm Mattress is a top choice for those looking for a quality, firm mattress.

For a firm yet comfortable mattress, the Sealy Posturepedic Plus 14-Inch Cushion Firm Mattress is an excellent option. This mattress is designed with Sealy's exclusive Posturepedic Technology, which provides targeted support and helps to relieve pressure points.

The cushion firm design of this mattress provides just the right amount of cushioning for a comfortable sleep, while still maintaining a firm and supportive feel. It also has a reinforced edge system, allowing you to utilize the entire surface of the mattress without worrying about sinking or sagging.

With its high-quality construction and expertly designed features, the Sealy Posturepedic Plus 14-Inch Cushion Firm Mattress is a great choice for those in search of a firm and supportive sleep surface.

The Beautyrest Harmony Lux Diamond Series 15-Inch Extra Firm Mattress is a top-rated option for those looking for an extra firm sleeping surface. This mattress features Beautyrest's exclusive RightTemp Wave Foam, which helps to regulate body temperature for a more comfortable sleep.

The Diamond Series also boasts Beautyrest's T2 Pocketed Coil Technology, which provides targeted support and helps to reduce motion transfer. The added layers of memory foam and gel memory foam provide exceptional pressure relief and contouring support.

With its advanced technologies and extra firm feel, the Beautyrest Harmony Lux Diamond Series 15-Inch Extra Firm Mattress is a top choice for those who want a firm and supportive sleep surface.

The Stearns & Foster Reserve Hepburn Luxury Firm Mattress is the epitome of luxury and comfort. This mattress is handcrafted with the finest materials and features a 15-inch luxury firm design with a layer of plush pillow top for added comfort.

The Reserve Hepburn is constructed with Stearns & Foster's exclusive IntelliCoil HD technology, which provides exceptional support and helps to reduce motion transfer. The added layer of plush pillow top not only adds to the comfort of this mattress but also helps to relieve pressure points.

Backed by a 10-year warranty, the Stearns & Foster Reserve Hepburn Luxury Firm Mattress is a top choice for those who want a luxurious and supportive sleep experience.