Go green and glamorous in a featherlight ball gown made from vegetable-dyed silks. The full skirt is a blend of gathered shantung and pleated organza; corded lace and a wide back bow that can be bustled accent the fitted bodice. About $2,825, Adele Wechsler Eco-Couture Collection. Cuff, Gerard Yosca, 212-302-4349. Sandals, Cocobelle.