EXCLUSIVE AT NET-A-PORTER. Theory's clothes are always so versatile, and this dress is a case in point. It can be worn solo or as a light jacket over jeans and a tee - the look was seen all over the street style circuit during fashion month. Cut from silk crepe de chine in a gray-green hue, it has a slightly loose fit that suits all kinds of body shapes. Use the tie-fastening belt to define the waist.