75% Nylon, 25% Spandex Imported Buckle closure Hand Wash Only 1). MULTI-WAY DEEP U SHAPED PLUNGE BACKLESS BRA - Convertible straps can be worn as a 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, and also as an 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. The bra's back strap can be pulled down lower than a normal bra to 5.5 inches. 3). SKIN-FRIENDLY, SEAMLESS, COMFORTABLE BRAS - The fabric is made of 75% Nylon and 25% Spandex, lightweight and sweat-absorbing. Cup lining is made of 100% Polyester; it's breathable and elastic. 4). USE BONDING CRAFT, SMOOTH & INVISIBLE, BRAS STAY IN PLACE - Soft thin cup; 1CM Double-sided tension straps are 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 showcases your beautiful back and shoulders. Perfect partner for tops, low-cut, and backless dresses that flaunt your sexy and charming back. These backless bras are a wardrobe staple that make wearing various fashionable outfits possible. Thanks to their versatile construction, these innovative bras can be worn with practically any outfit.