The straw mattress needs to be aired.

草垫子该晾一晾了。

《新英汉大辞典》

The straw mattress remained master of the field.

草席成了战场的主人。

youdao

They were still isolated and in irons, still undergoing interrogations, still each in a small cell illuminated by a single bulb, with a straw mattress.

他们仍然分开被关押，并且还戴着脚链，仍在被不断审问。每间小小的牢房里都只有一个照明用的灯泡，还有一张稻草床垫。

youdao

Maybe Raj will sleep on a straw mattress when he finally is sent to serve his 15.5 to 19.5 years in jail.

FORBES: I Knew Rajaratnam Was A Crook After He Tried To Sell Me Insider Info