|Playtex Womens Playtex 18 Hour Posture Back Wire-free Bra 4643 fiber content is Polyester/nylon/spandex/cotton. Playtex Womens Playtex 18 Hour Posture Back Wire-free Bra The next best thing to a massage! Extra back and shoulder support to improve posture. Power mesh panels. Breathable cup lining keeps you cool and dry. Hidden front close with five hooks, soft backing. Shiny lace look on upper cups and. Playtex Womens 4643 comes with 1 Bras per Pack.