Shop › Joseph Ribkoff violet semi formal dress Image 1 of 2 Image 2 of 2 Joseph Ribkoff violet semi formal dress from $187.99 Violette semi formal sheath dress with sheer assymetrical cold shoulder over-blouse. 96% Polyester, 4% Spandex. Size: Select Size 6 8 10 12 14 16 Add To Cart Added! Violette semi formal sheath dress with sheer assymetrical cold shoulder over-blouse. 96% Polyester, 4% Spandex.