Underwire provide a perfect support to your breast Anti-slip silicone strips at top and bottom of bra bring good stability Non padded cups with breathable fabric lining Side boning and elastic side wings to prevent shift and assure custom fit Optional straps adjust to multiple needs Triple support and anti-slip with no poke underwire, wide side boning and silicone strips. With optional straps, the bra can be cross-back, halter-neck to meet your different occasional needs.