An extra firm king mattress set from Rooms To Go can help you get a better, more comfortable night of sleep. Made by some of the most popular and trusted manufacturers in the business, our mattresses boast independently flexing coil systems that deliver support where your body needs it most and eliminate motion transfer for sounder nights of rest.
Reinforced edges maximize the useable area of our extra firm king mattress sets, while foam encasements facilitate proper airflow. Many of our selections also feature gel-infused knit covers designed to envelop your skin in softness while wicking heat away from the body. Constructed from different materials, our extra firm mattress sets have plenty to love.