TheHYBRID Firm mattress is built for those who prefer a more supportive sleep surface, combining a breathable cover with a medium quilt and cooling gel visco foam for comfort without sacrificing firmness. A firm transition layer works with the 567 pocket coil system to provide consistent support and excellent motion isolation, while steel edge reinforcement enhances structural integrity. The breathable support base promotes durability and airflow, and the mattress is compatible with adjustable beds. Made in the USA.