75% Nylon, 25% SpandexImportedBuckle closureHand Wash Only1). MULTI-WAY DEEP U SHAPED PLUNGE BACKLESS BRA-Convertible straps can be wear as low plunge bra, low back bra, backless bra, halter bra, criss-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- An innovative adjustable back single-button design strap creates a low-back silhouette. Bras back strap can be pulled down lower than normal bra to 5.5 inches. 3. SKIN-FRIENDLY, SEAMLESS, COMFORTABLE BRAS-The bras flank fabric is made of 75% Nylon, 25%Spandex, lightweight and sweat-absorbing. Cup lining is made of 100% Polyester,; its breathable and elastic. 4. USE BONDING CRAFT, SMOOTH & INVISIBLE, BRAS STAY IN PLACE- Soft thin cup; 1CM Double-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-The big U-shaped design of the back fully shows your beautiful back and shoulders. Perfect partner to tops, low-cut and backless dresses that flaunt your sexy and charming back. The backless bras are a wardrobe staplethat make wearing all kinds of fashion possible. These innovative bras can be worn with practically any outfit, thanks to their versatile construction.