What's better than a mattress designed for your child's growing body? A mattress designed to grow with your child! With its unique two-sided design, the YouthFlex Thrive is engineered to provide the alignment and support your child needs during the different growth stages of childhood. Side one, for use until the child is up to 70 lbs., provides a firmer feel while side two, for children 70 lbs. or more, offers a plush, more conforming feel. At the mattress core is a TheraWrap encased coil unit offering deep, restorative support. Side one features 5-Zone HD Performance firm foam for a firm yet cushioned feel that helps restore rapidly growing bodies at night. Side two features 7-Zone MemoryTouch foam, plus HD Enchanced Plush foam and TheraCool gel foam, for the same restorative support with the addition of a plush, cushioned feel that contours to every curve. Featuring an antimicrobial stretch cover, this premium mattress helps your child wake feeling refreshed at every stage! 10 Year Non-prorated Warranty.