Bedding, also known as bedclothes refers to the materials laid above the mattress of a bed for hygiene, warmth, to protect the mattress, and for decorative effect. Bedding is the removable and washable portion of a human sleeping environment. A set of bedding usually consists of a flat or fitted sheet which covers the mattress; a flat top sheet; either a blanket, quilt, or duvet, sometimes with a duvet cover which can replace or be used in addition to the top sheet. Modern bedding class "luxury" is made from Egyptian cotton without synthetic additives. Italian and French factories sew a bedding sateen with inserts made of natural or Dutch Venetian lace, which still do manually in monasteries, following age-old traditions.