Looking for a high-quality firm and supportive mattress? Meet the Lucid Comfort Collection 12” Firm Gel Memory Foam Mattress. Layers of firm responsive foam and premium memory foam combine to offer optimal support and contouring comfort. Cooling gel is infused in the memory foam. Then ventilation channels in the foam increase airflow and breathability. Finally, this mattress is finished with a moisture-wicking TENCEL ™ Lyocell blend cover for the ultimate level of comfort.