A woman's sack and petticoat of purple silk brocaded with a floral pattern in white with red centres, yellow, red and white and silver with red, and pink centres. The foliage is in green and the design is linked by vertical meandering trails in silver gilt.

The sack is open down the front, with no waist seams, robings extending to the hem, and elbow-length sleeves and double sleeve ruffles. The back has two double box pleats, extending shoulder to hem. The bodice, sleeves and sleeve ruffles are lined with white taffet; the hem is faced with the same fabric. The bodice lining is open at the back with 4 pairs of ties. The sack is made of 6 widths of silk, and shaped at the sides with gores of silk to fit over a wide fan-shaped, French hoop.

All that remains of the petticoat is 3 widths of silk, adapted purple silk and purple cotton binding tape to be tied apron-style under the front of the gown, possibly for fancy dress or modern display. The hem is faced back with white silk matching the bodice lining.

Some fragments of a narrow band of woven silver and silver-gilt lace (braid) remain on the right cuff; the robings may once have been trimmed in some way. Stitch marks on the sleeves lining would suggest that there once were weights inside each sleeve.