The Holiday Firm Mattress is for the sleeper who likes a very firm, supportive sleep surface, like sleeping on the ground but with cushioned support. 5-Series Pocket Coils, which allow for individualized pressure relief, make up the base layer of the mattress, topped by Orthopedic Eco-Flex plant-based base layer. Designed to keep you sleeping at your ideal temperature, this mattress also features Ventilated Gel Memory foam which promotes airflow throughout the mattress. Foam encased edging is designed to prevent your mattress from sagging and keep it in great condition for years to come.