Smart and Sexy Stretch Lace Triangle Wireless Bralette (SA1451). The Smart and Sexy Stretch Lace Triangle Wireless Bralette SA1451 has mesh lining for semi-transparent look. Wire-free bralette is styled with pretty floral lace, unpadded cups, and V-neckline. Convertible straps are fully adjustable and can be worn crossed. Smart and Sexy's Stretch Lace Triangle Wireless Bralette is made of nylon and spandex.