noun
Refers to the material or fabric, as in clothing or textiles.
このシャツはコットン100％です。
This shirt is 100% cotton.
noun
cotton pads; cotton buds
Abbreviation; often refers to cotton pads or cotton buds included in hotel amenity kits or toiletry sets.
アメニティセットにコットンが入っていた。
There were cotton pads in the amenity set.