I strongly recommend getting a 4′x6′ firm mat or board under any mattress you use with this platform.
https://www.amazon.com//dp/B017YETJFG
The Premium 18 Inch Smart Base eliminates the need for a traditional box spring and bed frame
18 Inch high with 17 Inch of clearance under the frame for 4 extra Inch of under bed storage space
Low-Stress, Easy Assembly in minutes with no tools required
Folding design allows for easy storage and movement through tight staircases and doorways
Strong, steel mattress support