Mattress topper material (4)
I believe the answer is:
foam
(Other definitions for foam that I've seen before include "Lather, froth" , "Bubbles on liquid" , "Suds" , "Froth, bubbles" , "Boiling bubbles" .)
I believe the answer is:
foam
(Other definitions for foam that I've seen before include "Lather, froth" , "Bubbles on liquid" , "Suds" , "Froth, bubbles" , "Boiling bubbles" .)