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This is a layer of fabric added to thin halters or bikini tops in order to make its underlying features less evident.
I once bought a bikini top that had really thin fabric; Mom insisted that I sew in a modesty layer underneath or even wear a bra.
by eViL pOp TaRt June 20, 2006

Words related to modesty layer

chastity clothing fabric layering modesty subtlety swe-ins