522 Coils The Med-Care Ultimate Dual Comfort Pillow Top Orthopedic Innerspring Adjustable Bed Mattress is a premium 522 Coil Lura-Flex mattress. Lura-Flex Innerspring System The Lura-Flex innerspring system is engineered to give the consumer total support and comfort. Lura-Flex is perhaps the best Offset design spring system available. Each coil flexes independently for more sensitivity to body contours. The Lura-Flex system offers more durability by reason of less innerspring friction. Also, Lura-Flex is more comfortable than normal Offsets - with no border sag or coil feel. Active Support Technology The Lura-Flex Open End Offset Innerspring utilizes Active Support Technology which allows your muscles to relax in a more natural sleep position. The coils adjust instantly to your sleep movements, comforting and supporting your body actively as you dream on. Mattress Is Reversible The mattress is reversible. A Pillow Top on one side and a Tight Top on the other side allow the consumer the option of either Pillow-Top comfort level or the firmer comfort of the Tight Top. This mattress is ideal for Dual Kings where one spouse likes their mattress comfort different -- yet the height of both mattresses will remain the same. Mattress Covering The covering for the Med-Care Ultimate mattress is a white Damask Tack N' Jump . Customized Mattress -- Made By Hand This mattress is made by hand, customized for each customer and is especially designed for all brands of adjustable electric or hospital beds. Height and Warranty The mattress is approximately 11" in height and carries a 20 Yr. Ltd. Warranty.