noun which may take the genitive case particle 'no'
nighttime use; for use at night; overnight
Used attributively with の to describe items or products intended for nighttime use, such as sanitary pads, skincare, or other overnight products.
夜用の生理用品を買った。
I bought nighttime sanitary pads.
このクリームは夜用です。
This cream is for nighttime use.