75 percent Nylon, 25 percent Spandex Imported Buckle closure Hand Wash Only 1). MULTI to WAY DEEP U SHAPED PLUNGE BACKLESS BRA to Convertible straps can be wear as low plunge bra, low back bra, backless bra, halter bra, criss to cross back bra, invisible bras, clear strapless bras, open back bra, low cut bra, wedding bras, also everyday bra. 2). BEAUTY BACK BRALETTE FOR LOW BACK DRESS OR BLOUSE to An innovative adjustable back single to button design strap creates a low to back silhouette. Bras back strap can be pulled down lower than normal bra to 5.5 inches. 3). SKIN to FRIENDLY, SEAMLESS, COMFORTABLE BRAS to The bras flank fabric is made of 75 percent Nylon, 25 percent Spandex, lightweight and sweat to absorbing. Cup lining is made of 100 percent Polyester, its breathable and elastic. 4). USE BONDING CRAFT, SMOOTH and INVISIBLE, BRAS STAY IN PLACE to Soft thin cup 1CM Double to sided tension straps more durable Underwire made of soft wire material, washing without deformation. Perfect fit for your body curve. 5). A CONVERTIBLE BRA FOR EVERY STYLE to The big U to shaped design of the back fully shows your beautiful back and shoulders. Perfect partner to tops, low to cut and backless dresses that flaunt your sexy and charming back. The backless bras are a wardrobe staple that make wearing all kinds of fashion possible. These innovative bras can be worn with practically any outfit, thanks to their versatile construction.