Front, back and binding are 87/13 cotton/spandex. Upper back piecing is 84/16 nylon/Lycra® power-mesh, inner bra liner is 90/10 polyester/Lycra® jersey. Medium support with mesh ventilation. Power-mesh panel in back for breathability. Chafe-resistant flat seams. Reflective "C" logo on back band. Oxford is 44% cotton, 44% polyester, 12% Lycra® spandex; upper back piecing is 84% nylon, 16% Lycra® power-mesh; inner bra liner is 90% polyester, 10% Lycra® jersey.