Calvin Klein Invisibles Thong (D3428). This silky thong panty has very flat waist and leg openings for an invisible look under clothes. Sides are seamless. Made of nylon/spandex with a cotton crotch lining. Laser-finish waist, leg openings and seamless sides lie flat under clothes. Mid-rise styling covers more of your tummy. Thong panties provide minimal rear coverage. Tagless to prevent skin irritation and chafing. This thong style replaces style F2636. You might also like Calvin Klein Invisibles Hipster Panty D3429.