Apparel lining is a layer of fabric attached to the inside of garments. Usually made from cotton, silk polyester or rayon, apparel lining can have multiple purposes. It is used for concealing seam allowances, interfacing & construction details; helping reinforce garment shapes & silhouettes; adding opaqueness to thinner, sheer fabrics; providing greater insulation. It’s a must-have for sheer garments, suiting, coats and more.