mattresses is a form of:

Mattress



noun
1.
(A fabric or heaby cloth) ពូក
Example: The campers made a mattress of pine branches.
ENGLISH MEANING
noun
1.
A quilted bed; a bed stuffed with hair, moss, or other suitable material, and quilted or otherwise fastened.
2.
A mass of interwoven brush, poles, etc., to protect a bank from being worn away by currents or waves.