superdown Luz Knit Top in White. - size XS (also in S) superdown Luz Knit Top in White. - size XS (also in S) 83% viscose 15% nylon 2% spandex. Hand wash cold. Asymmetrical shoulder detail. Ribbed knit fabric. Imported. SPDW-WS438. SDS634 U19. superdown is a contemporary label offering on-demand, on-trend, on-social apparel. Always on the pulse of the latest styles, superdown is the go-to for aspiring, trendy, fashion-loving babes who are #superdown for anything.