AI would say no. ?This is from the mfr. specs: 7. Sunrising Bedding 10 inch fit for most bed frames: Box Spring, Platrorm, Slats, Bunk Beds, Trundle Beds or even the Floor. (not for adjustable bed frames).
ASorry, we don't have a Full XL mattress size. The current Sunrising Bedding full size measurement is 54" x 75". Please measure your bed length and width before placing an order. Thank you. Sunrising Bedding Team
Ahi there , actually it is just a suggestion, with a plywood, the mattress can provide more support ,it depends on your own taste, but there will be no problem if you put our mattress directly on a box spring. have a nice day