MAC DUGGAL Women's Black Sweetheart A-line Slit Dress Size 16 NWT. Flattering Sweetheart Neckline A-line Slit Dress from Mac Duggal. Look impressively tall and slender in this wonderful dress designed by Mac Duggal 42006. The long dress has a sweetheart neckline and thin straps. Tiny floral designs of various colors are embedded in the bodice. The long dress is solid-patterned at the base. Made with opaque fabric, the dress brags a high-end slit to show off your sexy legs. This is a classy A-line strappy maxi dress. dress, women, a line, black, sweetheart, classy, sexy, winter, summer, spring, fall, stretch, party, cocktail, clubwear, disco, wedding. B5-03-23.