Model Xaviera Lysa wears a Miu Miu nylon and silk skirt, $1,195, from Saks Fifth Avenue; Dolce & Gabbana cotton and silk tank top, $795, from Saks Fifth Avenue; Dolce & Gabbana cotton and rayon sweater, $995, from Saks Fifth Avenue; Isabella Fiore clutch, $325, from Saks Fifth Avenue.