A structured woven fabric with body — the vertical seams and finished neckline hold their shape on their own without slipping, thanks to a boned or reinforced construction rather than stretch alone. Hand wash cold or dry clean, and check the reinforced seams aren't twisted before washing to keep the structure sitting correctly afterward. Avoid wringing, which can distort the shaped seams and the satin's sheen, and hang to dry away from direct heat, which can dull the finish.