Every Stearns & Foster Lux Hybrid 14.5"" Firm mattress is crafted to redefine what a hybrid mattress can be, with a unique feel that's unmatched by any other hybrid. Our exclusive PerfectForm Hybrid System-only available in Stearns & Foster Lux Hybrid mattresses-adds a layer of our signature memory foam to the top of each coil, creating hundreds of individual coil pockets that offer incredible airflow while perfectly conforming to your body.