IVY PARK Sports Bra in Black. - size XS (also in S) IVY PARK Sports Bra in Black. - size XS (also in S) Self: 79% poly 21% elastaneLining: 89% polyamide 11% elastane. Stretch fit. Contrast mesh panel inset. Elastic logo trim. Side pintuck detail. IVYP-WM59. 29U59M.