4" memory foam mattress pad from Overstock.com but I'm not sure that'll be enough. To top it off, the frame also seems way too low. Although we love platform beds, this futon frame only sits 3" off the ground. Should I learn to make it work by keeping the mattress and frame or should I splurge for something more comfortable? Do you have any tips for making a futon more accommodating as a bed? Image: Flickr user robinsan, licensed for use under Creative Commons.