Best Firm: Sealy Response Essentials 8.5-inch Firm Tight Top Mattress

Make no mistake about it, this is a firm king mattress that delivers on its promise to give you a solid sleeping surface. This 8.5-inch thick king mattress is an innerspring mattress that is topped with Sealy support foam to keep you from feeling the 400-plus coils inside the mattress. It’s firm yet supportive, but not as hard as sleeping on the floor. If you ask for firmness in a king mattress, this is what you want. If you’re a memory foam mattress user looking for more support or plagued with back problems, we think you’ll be satisfied with this tight top king mattress.

On the other hand, if you’re not prepared for a firm mattress, you may find this one to be too hard. Side sleepers may also find it uncomfortable since there is little give for shoulders. However, this king mattress is a great choice for back and stomach sleepers, who are likely to enjoy this firm sleeping surface and tight top.

• 8.5-Inch firm mattress with exclusive response Coil system (414 Coil count) to provide the perfect balance of comfort and deep Down support for a superior night’s Rest
• 1-inch Sealy Support firm form for a more supportive feel plus durable woven fabric cover for added comfort
• Sealy Cushion Air Foam made up of cushioning foam formed with peaks and valleys to allow additional airflow, as well as added softness for more comfort
• The foams used in the Sealy response essentials collection are CertiPUR-US Certified