bedding; bedclothes
General term for bedding items such as futons, sheets, blankets, and pillows.
押し入れに夜具をしまう。
I put away the bedding in the closet.
新しい夜具を買いそろえた。
I bought a new set of bedding.
I laid out bedding for the guest.
As soon as I got up, I folded up the bedding.
On sunny days, I air out the bedding.
布団 refers specifically to the Japanese futon mattress and quilt, whereas 夜具 is a broader term covering all kinds of bedding.
Compound of 夜 (night) and 具 (tool/equipment), literally 'night equipment'.