J Brand Lucy Velvet Cami in Gray. - size M (also in ) J Brand Lucy Velvet Cami in Gray. - size M (also in ) Self: 84% viscose 16% silkContrast: 100% silk. Dry clean only. Adjustable shoulder straps. Crushed velvet fabric. Semi-sheer back fabric. JBRA-WS49. JB001221. J Brand proves that the denim movement toward straight and skinny is hardly a trend. With an absolutely clean, anonymous back pocket and sophisticated lines, these jeans are already a classic set for the ages.