This bra offers you the ease of a front closure, with an adjustable hook & eye, in addition, the supportive and cooling back will provide you with the most comfortable fit and back support you could ever imagine. This posture back feature offers moisture wicking materials for all day comfort. The MagicLift design supports and shapes your bust without a wire. Feel no more shoulder strain with the wide and padded straps. These specially designed straps will relieve any kind of shoulder pressure. Last but not least to guarantee the best fit, the straps are adjustable in the back. Polyester.