Collocations for mattress - noun
ADJ.
double, single | comfortable | firm, hard | soft | lumpy, sagging
an old bed with a sagging mattress
an old bed with a sagging mattress
PREP.
on a/the ~
The children slept on mattresses on the floor.
The children slept on mattresses on the floor.
under a/the ~
My grandmother keeps her money under the mattress.
My grandmother keeps her money under the mattress.