padding; wadding; insulation; stuffing
Refers to the soft filling material inside clothing, bedding, or furniture, such as cotton, polyester fiber, or down. Used in contexts like sewing, tailoring, and manufacturing.
The padding in this jacket is polyester.
布団の中綿が偏ってきたので、打ち直しに出した。
The futon's wadding had become uneven, so I sent it to be re-fluffed.
Compound of 中 (naka, 'inside') and 綿 (wata, 'cotton'), referring to the cotton or padding placed inside something.