JMS Casual Attitude Cotton Spandex Wire Free Cup Frame Lining, Strap Lining: 100% Cotton. Strap pad Lining, Inner Cup Frame: 100% Nylon. Strap Pad: 100% Polyester. Cup Frame, Back: 95% Cotton, 5% Spandex. Cups, Outer Strap: 92% Cotton, 8% Spandex. Inner Sling: 88% Cotton, 12% Spandex. Exclusive of t bras closure - Cup frame lining, Strap lining: 100% Cotton; Strap pad lining, Inner cup frame: 100% Nylon; Strap - Modern wire-free silhouette in cool breathable cotton spandex - Inner sling and wide bottom band for comfort and support - Tag-free for comfort