pillowcase

This term refers specifically to the outer protective layer of a pillow, distinguishing it from the pillow itself or the inner ticking. It is primarily used in domestic and hospitality contexts to discuss bedding, hygiene, and interior decor.

While often associated with cotton or linen, the word is frequently paired with luxury materials like silk or satin in beauty and skincare contexts, where the fabric's effect on hair and skin is a primary concern.