Night Therapy Spring 12 Inch Euro Box Top Mattress and SmartBase Complete Set, Twin SmartBase bed frame is 14 inches high with 12.5 inches of clearance under the frame for valuable under-bed storage space Folding SmartBase design allows easy storage and movement through tight staircases and doorways, replacing a traditional box spring and frame Mattress: Worry Free 10 year limited warranty SmartBase: Worry Free 5 year limited warranty