Panache Women's Sport Tank with Built In Underwired Sports Bra 63% Polyamide/20% Elastane/17% Polyester Imported Hand Wash The foam moulded seam free inner cups encapsulate each breast, offering control and a defined shape Breathable outer performance fabric, drapes nicely over the body and helps to keep the wearer dry and comfortable - made of the same material as the sports bra Silicone encased underwires give great , comfortable support and wide cushioned shoulder straps disperse pressure for added comfort A wide hook and eye hidden under the back panel, makes sure the integral bra is securely fastened. he racer back option gives even more support for high impact exercise