Buckle closureHand Wash OnlyMaterialThe bras are made of quality cotton and polyester material, which is a soft, stretchy, breathable cloth that provides exceptional comfort and durability. Besides, the fabric is soft and breathable, which can give you a nice dressing experience.Comfortable & AdjustableThe front of lace wireless bras uses adjustable straps, which make the length adjustment much easier, the straps are elastic, thus it is comfortable for you to wear,easy to put on and take off. In addition, the back of the bra has 4 rows of buckles for easy adjustment and to optimize the tightness.Low Back Lifting BraThe back of underwear bra has a design of low back style and U-shaped, which not only meets your daily wear but also allows you to wear some backless evening dresses; It can fit your body, effectively avoiding the embarrassment of showing your underwear, showing your beautiful curves and back.Suitable for Many OccasionsThe inside is triangular thin cotton, fresh, comfortable and breathable, thin but not dew point, no Steel ring, and no binding sense. It is also an amazing gift choice for your girlfriend or wife for birthdays, Christmas, anniversaries, and backless bras with any low cut dresses, tank tops, open back t-shirts, wedding and prom dress, could be used as an everyday bra as well.Size GuideOnly suit for small breats size (A-C cups), the triangle cup is not wide enough, it may falls out if you are over a C cup.Not suitable for D and plump ladiesWomen Sexy Deep U Low Back Lace Bra Size ChartS for 32/70A/70B/70C;M for 34/75A/75B/75C;L for 36/80A/80B/80C;XL for 38/85A/85B/85C;XXL for 40/90A/90B/90C;XXXL for 42/95A/95B/95C.