Explore 69+ Captivating Extra Firm King Mattress Voted By The Construction Association

The Sealy Response Performance 14-Inch Cushion Firm Euro Pillow Top Mattress is a top pick for those who prefer an extra firm sleeping surface. With a 14-inch thickness, this mattress provides the perfect balance of comfort and support. It features a cushion firm euro pillow top that contours to your body for a comfortable sleep experience. The Sealy Response Performance also boasts a Posturepedic Technology that targets the heaviest part of your body for reinforced support, making it an ideal choice for back and stomach sleepers.

One of the standout features of this mattress is its SealyCushion Extra Soft Foam, which adds an extra layer of cushioning for a more plush feel. It also has a Response Pro Encased Coil System that provides targeted support and reduced motion transfer. The Sealy Response Performance is designed with CertiPUR-US certified foams, ensuring it is made without harmful chemicals and materials.

For those who want a firm yet comfortable mattress, the Sealy Response Performance 14-Inch Cushion Firm Euro Pillow Top Mattress is an excellent choice. Its high-quality materials and innovative design make it one of the best extra firm mattresses on the market.

The Serta Perfect Sleeper Elite Trelleburg II 14.25-Inch Extra Firm Mattress is another top contender for those seeking an extra firm sleeping surface. This mattress features a 14.25-inch thickness and a Comfort XD Foam layer that provides pressure relief and support. It also has a layer of Cool Twist Gel Memory Foam, which helps regulate body temperature for a more comfortable sleep.

The Trelleburg II is engineered with Serta's 886 Custom Support Firm Individually Wrapped Coil System, which provides excellent support and reduces motion transfer. It also has a BestEdge Foam Encasement that ensures edge-to-edge support and prevents sagging. The Serta Perfect Sleeper Elite Trelleburg II is made with CertiPUR-US certified foams, guaranteeing it is safe and free from harmful chemicals.

If you prefer a firmer mattress with a touch of plushness, the Serta Perfect Sleeper Elite Trelleburg II 14.25-Inch Extra Firm Mattress is an excellent choice. Its advanced features and layers of support make it one of the best extra firm mattresses on the market.

The Beautyrest Silver BRS900 13.75-Inch Extra Firm Mattress is a luxurious option for those who want a firm and supportive sleep surface. It features a 13.75-inch thickness and a DualCool™ Technology Fiber layer that provides superior temperature management and moisture wicking. The BRS900 also has a layer of Beautyrest Gel Memory Foam, which contours to your body and relieves pressure points.

One of the standout features of this mattress is its T3 Pocketed Coil® Technology, which provides individualized back support and reduced motion transfer. It also has a BeautyEdge Foam Encasement that ensures edge-to-edge support and prevents sagging. The Beautyrest Silver BRS900 is designed with CertiPUR-US certified foams, ensuring it is safe and free from harmful chemicals.

For those who want a high-quality, extra firm mattress, the Beautyrest Silver BRS900 13.75-Inch Extra Firm Mattress is an excellent option. Its advanced technology and superior support make it one of the best extra firm mattresses available.

The Stearns & Foster Estate Rockwell Luxury Firm Euro Pillow Top Mattress is a premium option for those seeking a luxury sleeping experience. This mattress boasts a 14-inch thickness and a PrimaCool™ Performance Fabric with TENCEL® layer that provides superior breathability and moisture wicking. The Rockwell also has a layer of Indulge HD Memory Foam, which contours to your body and relieves pressure points.

One of the standout features of this mattress is its IntelliCoil® Advanced Coil System, which adapts to your body and provides targeted support. It also has a PrecisionEdge™ System that ensures edge-to-edge support and prevents sagging. The Stearns & Foster Estate Rockwell is made with CertiPUR-US certified foams, guaranteeing it is safe and free from harmful chemicals.

If you want a luxurious, extra firm mattress that offers both comfort and support, the Stearns & Foster Estate Rockwell Luxury Firm Euro Pillow Top Mattress is an excellent choice. Its premium materials and advanced features make it a top contender for the best extra firm mattress on the market.

The Tempur-Pedic TEMPUR-ProAdapt 12-Inch Extra Firm Mattress is a top-of-the-line option for those who want an extra firm sleeping surface. This mattress features a 12-inch thickness and a TEMPUR-APR™ Comfort Layer that adapts to your body's shape, weight, and temperature for personalized support. It also has a layer of Original TEMPUR® Support Layer, which provides pressure relief and helps distribute body weight evenly.

The TEMPUR-ProAdapt is engineered with a SmartClimate® Dual Cover System that provides a cool-to-touch surface and moisture-wicking technology. It also has a TEMPUR® Material Support Layer that provides targeted support and reduces motion transfer. The Tempur-Pedic TEMPUR-ProAdapt is made with CertiPUR-US certified foams, ensuring it is safe and free from harmful chemicals.

For those who want a top-of-the-line, extra firm mattress, the Tempur-Pedic TEMPUR-ProAdapt 12-Inch Extra Firm Mattress is an excellent choice. Its innovative features and luxurious materials make it one of the best extra firm mattresses available.

The Simmons Beautyrest Black K-Class Ultra Plush Pillow Top Mattress is a high-end option for those who prefer an extra firm sleeping surface with a touch of plushness. This mattress features a 15-inch thickness and a BlackICE™ 4.0 layer that provides cooling and heat-dissipating technology. It also has a layer of Beautyrest Gel Memory Foam, which contours to your body and relieves pressure points.

One of the standout features of this mattress is its T3 Pocketed Coil® Technology, which provides individualized back support and reduced motion transfer. It also has a BeautyEdge Foam Encasement that ensures edge-to-edge support and prevents sagging. The Simmons Beautyrest Black K-Class is designed with CertiPUR-US certified foams, guaranteeing it is safe and free from harmful chemicals.

If you want a high-end, extra firm mattress that offers both support and comfort, the Simmons Beautyrest Black K-Class Ultra Plush Pillow Top Mattress is an excellent choice. Its advanced features and luxurious design make it one of the best extra firm mattresses on the market.

The Sleep Number 360 i8 Smart Bed Mattress is a unique option for those seeking an extra firm sleeping surface. This mattress features adjustable firmness levels, allowing you to customize your sleep experience. It also has a layer of CoolFit™ Foam that provides pressure relief and helps regulate body temperature.

The Sleep Number 360 i8 is engineered with Sleep Number's Responsive Air™ technology, which adjusts to your body's movements and provides personalized support. It also has a DualAir™ Adjustability feature that allows you and your partner to adjust each side of the mattress to your desired firmness level. The Sleep Number 360 i8 is designed with CertiPUR-US certified foams, guaranteeing it is safe and free from harmful chemicals.

If you want a customizable, extra firm mattress, the Sleep Number 360 i8 Smart Bed Mattress is an excellent option. Its innovative features and ability to adjust to your desired firmness level make it a top contender for the best extra firm mattress available.

The Purple Hybrid Premier 4-Inch Mattress is a unique option for those who want an extra firm sleeping surface with a touch of pressure relief. This mattress features a 4-inch thickness and a Purple Grid™ layer that provides pressure relief and support. It also has a layer of Responsive Support Coils that adapt to your body's movements and provide targeted support.

One of the standout features of this mattress is its Hyper-Elastic Polymer™ material, which is designed to be both soft and supportive. It also has a non-toxic, hypoallergenic knit cover that is both breathable and moisture-wicking. The Purple Hybrid Premier is designed with CertiPUR-US certified foams, ensuring it is safe and free from harmful chemicals.

If you want a unique, extra firm mattress with a touch of pressure relief, the Purple Hybrid Premier 4-Inch Mattress is an excellent choice. Its innovative design and high-quality materials make it one of the best extra firm mattresses on the market.

The Casper Wave Hybrid Mattress is a top pick for those who want a supportive and comfortable extra firm sleeping surface. This mattress features a 13-inch thickness and a layer of AirScape™ Foam that provides pressure relief and helps regulate body temperature. It also has a layer of Zoned Support™ Max that provides targeted support for different areas of your body.

The Casper Wave Hybrid is engineered with a layer of pocketed springs that adapt to your body's movements and provide pressure relief. It also has a breathable, moisture-wicking cover that helps keep you cool and comfortable throughout the night. The Casper Wave Hybrid is designed with CertiPUR-US certified foams, ensuring it is safe and free from harmful chemicals.

For those who want an extra firm mattress with targeted support and pressure relief, the Casper Wave Hybrid Mattress is an excellent option. Its advanced features and high-quality materials make it one of the best extra firm mattresses available.

The Tuft & Needle Mint Mattress is a budget-friendly option for those seeking an extra firm sleeping surface. This mattress features a 12-inch thickness and a layer of Adaptive Foam that provides pressure relief and support. It also has a layer of T&N Adaptive® Foam that helps regulate body temperature for a comfortable sleep.

One of the standout features of this mattress is its open-cell structure, which helps promote airflow and prevent heat buildup. It also has a breathable, moisture-wicking cover that helps keep you cool and comfortable throughout the night. The Tuft & Needle Mint is designed with CertiPUR-US certified foams, ensuring it is safe and free from harmful chemicals.

If you want an affordable, extra firm mattress with high-quality materials, the Tuft & Needle Mint Mattress is an excellent choice. Its innovative design and budget-friendly price make it a top contender for the best extra firm mattress available.